The change in entropy: question_answer89) In Carnot engine efficiency is 40% at hot reservoir temperature T. For efficiency 50% what will be temperature of hot reservoir? | This implies that, question_answer40) A mass of diatomic gas \[(\gamma =1.4)\]at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from \[27{}^\circ C\] to \[927{}^\circ C\]. In a thermodynamic process, pressure of a fixed mass of gas is changed in such a manner that the gas molecules gives out 30 joules of heat and 10 J of work is done on the gas. | | Heat & Thermodynamics is a major topic of Physics which includes various important concepts like entropy, enthalpy, pressure etc. [Latent heat of vaporization of steam = 540 cal, question_answer61) If an air conditioner is put in the middle of a room and started working. Purchase Courses JEE NEET Study Material : Notes , Assignment. Videos Here, heat, temperature, specific heat, and latent heat are concepts which are studied. The final volume of the gas is 2 liters. During another process it does 25J of work and its temperature decreases by 5K. Free Question Bank for NEET Chemistry Thermodynamics. Then, choose the correct option from the following. An ideal gas is initially at \[{{P}_{1}}\], \[{{V}_{1}}\] is expanded to\[{{P}_{2}}\], \[{{V}_{2}}\] and then compressed adiabatically to the same volume f[ and pressure \[{{P}_{3}}\] If W is the net work done by the gas in complete process which of the following is true? question_answer1) When an ideal monoatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is, question_answer2) The internal energy change in a system that has absorbed 2 Kcal of heat and done 500 J of work is, question_answer3) In a given process on an ideal gas, \[dW=0\]and \[dQ\text{ }<\text{ }0.\]Then for the gas, question_answer4) Unit mass of a liquid with volume \[{{V}_{1}}\] is completely changed into a gas of volume K, at a constant external pressure P and temperature T. If the latent heat of evaporation for the given mass is L, then the increase in the internal energy of the system is, question_answer5) Two kg of water is converted into steam by boiling at atmospheric pressure. Lalit Sardana Sir | Then. The cycle consists of three steps: (i) an isothermal expansion \[(a\to b),\] (ii) an isobaric compression \[(b\to c),\] and (iii) a constant volume increases in pressure \[(c\to a).\] If \[{{T}_{a}}=400K,\] \[{{P}_{a}}=4atm,\]and \[{{P}_{b}}={{P}_{c}},=1atm,\] the work done by the gas per cycle is, A 500 ml sealed cylinder contains nitrogen at a pressure of 1 atm. An inventor claims its efficiency to be 26%, then: question_answer60) A steam engine takes 0.1 kg of steam at \[100{}^\circ C\] per minute and cools it down to \[20{}^\circ C.\]What is the heat rejected by the steam engine per second? The volume of 1 g of steam is 1671 cc and the latent heat of evaporation is 540 cal. If the system is returned to state 1 and \[{{Q}_{1\to 2}}+10kJ\] the work done \[{{W}_{1\to 2}}\]is, During an adiabatic process of an ideal gas, if P is proportional to \[\frac{1}{{{V}^{1.5}}}\], then the ratio of specific heat capacities at constant pressure to that at constant volume for the gas is. The correct P-F diagram representing the two processes is: question_answer42) One mole of an ideal gas at an initial temperature of T K does 6R joules of word adiabatically. question_answer81) When the state of a gas adiabatically changed from an equilibrium state A to another equilibrium state B an amount of work done on the system is 35 J. The gas goes from I to F by (i) IAF, (ii) IBF, (iii) ICE The heat absorbed by the gas is, A closed system undergoes a process \[1\to 2\] for which the values \[{{W}_{1-2}}\] and \[{{Q}_{1-2}}\] are 50 kJ and - 20 kJ respectively. | | The temperature of the gas is (use ln 9 = 2 and\[R=\frac{25}{3}J/mol-K\]), question_answer77) A gas is expanded from volume \[{{V}_{0}}\] to \[2{{V}_{0}}\] under three different processes. The volume of 1 g of steam is 1671 cc and the latent heat of evaporation is 540 cal. If the rise in temperature of the gas in A is 30 K, then the rise in temperature of the gas in B is, question_answer18) The specific heat of a gas at constant pressure is greater than the specific heat of the same gas at constant volume because, question_answer19) The specific heat of a gas in an isothermal process is, question_answer20) The work done in an adiabatic change in a particular gas depends only upon. https://www.studyadda.com The initial pressure and volume of the gas are \[{{10}^{5}}N/{{m}^{2}}\] and 6 liter respectively. | Thermodynamics definition, the science concerned with the relations between heat and mechanical energy or work, and the conversion of one into the other: modern thermodynamics deals with the properties of systems for the description of which temperature is a necessary coordinate. | Which of the following holds good for an isochoric process? Then it is heated at constant volume by supplying 150 J of energy. Free Question Bank for 11th Class Physics Thermodynamical Processes Thermodynamics Conceptual Problems hi the second process, Some of the thermodynamic parameters are state variables while some are process variables. In the P-V diagram, I is the initial state and F is the final state. Thermodynamics Resources Videos. If the gas is taken from state A to B via process in which the net heat absorbed by the system is 12 cal, then the net work done by the system is \[\left( 1\text{ }cal=4.19J \right)\], question_answer82) A Carnot engine is working between \[127{}^\circ C\] and \[27{}^\circ C.~\]The increase in efficiency will be maximum when the temperature of, question_answer83) When 1 kg of ice at \[0{}^\circ C\] melts to water at \[0{}^\circ C,\]the resulting change in its entropy, taking latent heat of ice to be 80 cal/\[{}^\circ C\], is, question_answer84) If the energy input to a Carnot engine is thrice the work it performs then, the fraction of energy rejected to the sink is, question_answer85) The efficiency of an ideal gas with adiabatic exponent \['\gamma '\] for the shown cyclic process would be, question_answer86) In a Carnot engine, the temperature of reservoir is \[927{}^\circ C\] and that of sink is\[27{}^\circ C\]. For an ideal gas graph is shown for three processes, Process 1, 2 and 3 are respectively. Newton’s law of cooling is another important topic studied under the thermodynamics of physics. A thermodynamic system undergoes cyclic process ABCDA as shown in fig. The volume changes from \[2\times {{10}^{-3}}{{m}^{3}}\] to \[3.34{{m}^{3}}.\]The work done by the system is about. The relation between U, P and V for an ideal gas in an adiabatic process is given by relation \[U=\text{ }a+bPV.\] Find the value of adiabatic exponent \[\left( \gamma \right)\]of this gas. | Thermodynamics deals only with the large scale response of a system which we can observe and measure in experiments. Free Question Bank for JEE Main & Advanced Physics Thermodynamical Processes This unit is part of the Physics library. question_answer54) A one mole sample of an ideal gas is carried around the thermodynamic cycle shown in the figure. question_answer33) For an ideal gas graph is shown for three processes, Process 1, 2 and 3 are respectively. The work done during isobaric compression is, 1 gm of water at a pressure of \[1.01\times {{10}^{5}}\] Pa is converted into steam without any change of temperature. The pressure-volume diagram shows six curved paths that can be followed by the gas (connected by vertical paths). Notes If W is positive, the system has lost energy from doing work on its surroundings.. As written the equations have a problem … [Given \[{{(3)}^{5/3}}=\text{ }6.19\]]. In which of the process is the amount of work done by the gas greater? Sample Papers | hi the second process, question_answer13) Some of the thermodynamic parameters are state variables while some are process variables. The amount of heat supplied to the gas in the process 1, 2, 3 and 4 are \[{{Q}_{1}}\], \[{{Q}_{2}}\], \[{{Q}_{3}}\] and \[{{Q}_{4}}\] respectively, then correct order of heat supplied to the gas is [AB is process-1, AC is process-2, AD is adiabatic process-3 and AE is process-4]. The work done by the system in the cycle is. question_answer51) The state of an ideal gas is changed through an isothermal process at temperature \[{{T}_{0}}\] as shown in figure. Current Affairs The value of \[\frac{{{V}_{a}}}{{{V}_{c}}}\] will be, question_answer64) A diatomic ideal gas undergoes a thermodynamic change according to the P-V diagram shown in the figure. Learn thermodynamics physics with free interactive flashcards. See more. The pressure of the gas in final state is. Study Packages The gas has a higher ternperature \[\,{{T}_{2}}\] at the final states a and b, which it can reach the paths shown. | The correct P-F diagram representing the two processes is: One mole of an ideal gas at an initial temperature of T K does 6R joules of word adiabatically.