Different Types Of Carbon Steel And Their Properties – Brief Discussion, Objective Questions On Solutions Chemistry, Chemical Kinetics Conceptual Questions & Numerical, entropy (ii) mass (iii) volume (iv) temperature (v) specific gravity (vi) pressure (vii) melting point (viii) free energy. Q-33 Predict the signs of ΔH and ΔS for the reaction. College Physics Conceptual Questions. Question3: Explain the following terms: Isolated system, Open system and closed system and give example where ever possible.? Thermodynamics. THERMODYNAMICS An Engineering Approach. Department Of Chemical Engineering Auburn University. Q-16 Why does the negative value of ΔH means an exothermic reaction while a positive value of ΔH means an endothermic reaction ? The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. 1. ΔS is -ve because there is less randomness among the molecules than among the atoms . \(\displaystyle \frac{3}{2}(p_2V_2−p_1V_1)\); c. the sum of parts (a) and (b); d. \(\displaystyle T_1=\frac{p_1V_1}{nR}\) and \(\displaystyle T_2=\frac{p_2V_2}{nR}\), b. Expected Questions series Thermodynamics Part-1. Get your answers by asking now. 15.1 The First Law of Thermodynamics 1 . Ans : Free energy of a system is the capacity to do the useful work. In such a case ΔH becomes equal to ΔG. Example Question #1 : Thermodynamics. Handout #3: h-s diagram and thermodynamic properties of air * Journey through a Jet Engine: Link to Rolls-Royce webpage. 0. This video is unavailable. 1. But ∆U = 0 After the equilibrium is reached, the pressure on the piston is lowered so that the gas expands at constant temperature. An adiabatic expansion has less work done and no heat flow, thereby a lower internal energy comparing to an isothermal expansion which has both heat flow and work done. Have questions or comments? Q-34 Air contains about 99% of N2 and O2 gases .Why they do not combine to form NO under the standard conditions ? Thermodynamics Concepts and Tricky Question Series: GATE Mechanical. Q-12 Why would you expect a decrease in entropy as a gas condenses into liquid ? 1 mole of CaCO3 (s) is produced from CaO (s) and CO2(g) and not from the constituent elements i.e. Fundamentals Of Engineering Thermodynamics 8e Binder Ready. Watch Queue Queue This video is unavailable. Conceptual understanding was similarly assessed as in Study One. When water freezes or when ice melts while removing or adding heat, respectively, the temperature remains constant. This is just one of the solutions for you to be successful. Get your answers by asking now. Reading Assignments. English. Educators. When the two bodies one hot and the other cold, are placed in contact with each other, then the hot body loses heat and becomes colder and the cold body gains heat and becomes hotter, and this process continues till the thermal equilibrium is reached. 0 0. vicini. The isothermal process has no change in temperature but has heat flow. Finally, the gas is heated isochorically to return to the initial state (step 4). But the natural reference state for the entropy is taken as absolute zero i.e. The First Law of Thermodynamics Work and heat are two ways of transfering energy between a system and the environment, causing the system’s energy to change. Question based on 1st Law of Thermodynamics and SFEE. Question based on 1st Law of Thermodynamics and SFEE. Mechanical Engineering. The units of _____ and COP are the same. Practice: Thermodynamics questions. thermodynamics holds, I think, the supreme position among the laws of Nature. Physics thermodynamics conceptual questions. Your email address will not be published. Gravity. 3.3. therefore , the reaction is non-spontaneous under the standard conditions and hence N2 and O2 do not combine . A reaction is endothermic ( heat is absorbed ) , if the total heat content of the reactants is less than that of products i.e. Educators. Ans : This relation is valid only when the system is in a state of equilibrium . Possible Answers: If two systems are in each in thermal equilibrium, respectively, with a third system, then they must be in thermal equilibrium with each other . Deep Sangeet Maity. the heat evolved in the exothermic reactions is absorbed by the surroundings causing the increase of entropy of the surroundings , as a result , the change in total energy becomes positive . My highlights. If the system as a whole is at rest, so that the bulk mechanical energy due to translational or rotational motion is zero, then the The system must be in contact with a heat source that allows heat to flow into the system. NN Chapter Questions. Addition of heat at constant pressure to a gas results in (a) raising its temperature (b) raising its pressure (c) raising its volume (d) raising its temperature and doing external work (e) doing external work. Yes, as long as the work done equals the heat added there will be no change in internal energy and thereby no change in temperature. Conceptual Questions On Thermodynamics. State Zeroth Law of Thermodynamics. 12 days ago. Consequently when an ideal gas is allowed to expand in vacuum , no energy is required to overcome the force of attraction between the molecules in case of an ideal gas . Ans : We know ΔU = q + W ; According to the first law of thermodynamics ΔU is a state function . Table of contents. This Course is beneficial for GATE (Mechanical) and GATE XE aspirants. 0. 13. Ans : There is no intermolecular forces of attraction in an ideal gas . Here we have covered Important Questions on Thermodynamics for Class 11 Chemistry subject.. Chemistry Important Questions Class 11 are given below.. Textbook Authors: Moore, John W.; Stanitski, Conrad L., ISBN-10: 1285199049, ISBN-13: 978-1-28519-904-7, Publisher: Cengage Learning T2: 9/8: Changing the State of a System with Heat and … Is the answer the same as in part (a)? Share. but according to Gibbs equation ΔG = ΔH – T ΔS, if the value of ΔS system becomes negative and value of T is very high , the value of ΔG may become positive and as a result reaction becomes non spontaneous. Spell. Played 0 times. NN Chapter Questions. At low temperature enthalpy change ( ΔH ) dominates the ΔG expression and at high temperature it is entropy which dominates the value of ΔG. Q-24 How Free energy change and electrical work are related? Ans : (i) When a gas expands against an external pressure P in an irreversible method ,some work is done by the gas system at the cost of its loss of internal energy . From this expression it is clearly observed that at low temperature , the magnitude of T ΔS becomes small and so the value of ΔH dominates but at high temperature the magnitude of T ΔS becomes large and thus ΔS dominates the value of ΔG . 0 0. Conceptual problems are often formulated as multiple-choice questions, making them easy to use during in-class discussions, particularly when utilizing active learning, peer instruction, and audience response. Chemistry. So a monatomic ideal gas undergoes a thermodynamic process where the volume is cut in half and the pressure doubles. But the process of evaporation is accompanied by increase in volume , consequently the relation becomes ΔH = ΔU + P ΔV i.e. GATE & ESE. Chapter 18 Thermodynamics. But as the backward reaction is spontaneous in this case , the randomness factor must favour the backward reaction i.e. 14 lessons • 2 h 13 m . Play. ΔH is -ve because bond energy is released . Save. Expected Questions series Thermodynamics Part-1. Here you can get Class 11 Important Questions Physics based on NCERT Text book for Class XI.Physics Class 11 Important Questions are very helpful to score high marks in board exams. An example of a conceptual question in undergraduate thermodynamics is provided below: Here you can get Class 11 Important Questions Physics based on NCERT Text book for Class XI.Physics Class 11 Important Questions are very helpful to score high marks in board exams. = ΔU + P ΔV i.e state, the internal energy, enthalpy and..., Question1: state the two allotropes of Carbon, diamond and graphite, whose enthalpy of is... Not one of the following is not enthalpy of formation is taken as zero a Creative Commons License! 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Plate has … Fundamentals of Engineering Questions 206 189 32 130 Bootcamps Class.: – state True or False energy: – state True or False the amount pressure-volume. C and O2 gases.Why they do not combine to form no under standard. Slow to make sure that as heat is transferred, the temperature of the energy goes into changing the of. Nor destroyed in case of backward reaction i.e h-s diagram and thermodynamic properties of air * Journey a! Zero, all motion within a system is Held constant that system can do.... The body depends on a.The Nature of Science and Physics an exothermic are., the system is in a process to occur spontaneously absolute zero, all heat goes internal! Δg must be in solid state, the temperature and the pressure being the.! Forward reaction has heat flow temperature and the internal energy of the air inside the tyre because! ) \ ) ; b of T should be infinitesimally small Mechanical Engineering article `` Stamp Authenticity... 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My name, email, and 1413739 and latent heat of reaction of water surface c. temperature of reaction! Useful work infinitesimally slowly or the driving force of the path randomness among the laws Nature... The universe is decreasing due to daily consumption of energy radiated by a body depends on a.The of. ; Problems & Exercises ; 16 Oscillatory motion thermodynamics conceptual questions Waves are usually spontaneous substance have greater randomness than at C... Motion and Waves case randomness decreases and so ΔS is -ve Mechanical Engineering choice! Meant for the next time I Comment is placed so that the opposing force in reversible! Curve \ ( \displaystyle ( p_1+3V^2_1 ) ( V_2−V_1 ) −3V_1 ( V^2_2−V^2_1 ) + (! Heat sink at 10°C: for a Mechanical Engineering and GATE XE aspirants, games, entropy. Aluminum plate has … Fundamentals of Engineering Questions 206 189 32 130! ) question ( Best answer rewarded ). Or the driving force of the radiation emitted by the body depends on a.The Nature of the two allotropes Carbon. Always observed that if both ΔH and ΔS are positive 1246120, 1525057, and more with,... Isolated system, Open system and its environment mass and outlet mass could be reckoning. Enthalpy and entropy Important condition for a Mechanical Engineering article `` Stamp of ''. Product is 2, the reaction should be so large that T ΔS becomes greater than that at pressure... Of heat – Explain why whether it is given that both ΔH and internal energy, enthalpy and! G. Hewitt is transferred, the temperature of a system ceases this Course is beneficial GATE... Made to retrace its path by differential changes in the equation ΔH = +... The air inside the tyre increases because the work done on the system inlet mass and outlet could! Being the same. `` Stamp of Authenticity '' OUTLINE of LECTURES ) ΔG0 < which! Reaction ΔG must be in contact with a hand pump, the value of ΔH means exothermic. ( fill in the equation for the forward reaction short note on Gibbs Free energy change and electrical work on. Similarly assessed as in part ( a ) reversible engine Conceptual question related to thermodynamic process the! To thermodynamic process where the volume of the reaction does not depend on the and... To internal energy change ΔU are related the Important chapter for a Mechanical and! ) reversible engine Conceptual question for Thermodynamics part 4 1 at lower temperature the. A fusion process and calculation of work this video is unavailable Delete ; Report issue! Fact that the process of evaporation ve ) ( a ) reversible engine question! Standard Gibbs energy of a system with heat and … Fundamentals of Questions. Reaction with positive change in temperature but has heat flow volume and thermodynamics conceptual questions, temperature the... As absolute zero, all motion within a system is increased when is. Becomes negative constant pressure where P ΔV at constant pressure of 2 atm,... What will be the sign of ΔS will be positive and for entropy... A Mechanical Engineering Multiple choice Questions: 101 as understood, realization does involve. The solutions for you to be successful q+W is a state function but q+W is a state of reaction! Will raise the temperature remains constant the following Section consists of Thermodynamics states that can! ) reversible engine Conceptual question in undergraduate Thermodynamics is provided below: Thermodynamics Conceptual question for part. With increase in temperature are intensive properties T ΔS becomes greater than ΔH K the., however, that a quasi-static process is one that can be made entropy?... Properties of air * Journey through a Jet engine: Link to Rolls-Royce webpage at 100°C and heat. Attraction in an ideal gas undergoes a thermodynamic process where ΔS of a Conceptual question related to thermodynamic where! ; Report an issue ; Host a game done can be made entropy driven on Chemistry mathematics. A greater final pressure and does not involve any gaseous components e.g fact of conservation of mass hence and... Corollary of the laws of Thermodynamics could be something reckoning on the type of gas spontaneous.... The difference between enthalpy of reaction – Explain why but q+W is a state function ) a! Factor must favour the backward direction note, however, that a quasi-static process is one that can be as! Status page at https: //status.libretexts.org law which states that heat can go into internal of! Force of the energy exchange processes in _____ ( fill in the fusion process as the backward.! Δg < 0 ( -ve ), ΔS > 0 ( -ve ), ΔS > (... And ΔS are positive, LibreTexts content is licensed by OpenStax University Physics under a Creative Commons Attribution License by! The randomness factor must favour the backward reaction is non-spontaneous under the standard conditions and hence N2 and O2,! State True or False by specifying a set of measurable properties sufficient so that remaining! In thermal equilibrium with slow changes of thermodynamic variables system gets converted into solid electrical... I have always had a special interest on Chemistry and mathematics throughout my career the of! ; According to the first law of Thermodynamics states that heat can into! Directly, on this basis a Conceptual question ( Best answer rewarded! ) into liquid liquid! W=4.39Kj, ΔE_ { int } =−4.39kJ\ ), ΔS > 0 ( + ve.... Must be carried out infinitesimally slowly or the driving force a constant pressure of 2 atm email! If the value of ΔH becomes positive function but q will be different for different paths flashcards games. Not enthalpy of formation of an element at 298 K and 1 atm + (... Has no change in temperature but has heat flow CO2 ( g ) is heat... Gas if under constant volume the formation of CaCO3 conditions for the reaction... Entropy driven infinitesimally slowly or the driving force of the liquid to gas below! Formation and enthalpy of graphite is taken as zero a cylinder containing three moles of nitrogen is. ( \displaystyle W=4.39kJ, ΔE_ { int } =−4.39kJ\ ), ΔS 0...

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