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qUESTIONS

One mole of diatomic ideal gas undergoes a cyclic process ABC as shown in figure. The process BC is adiabatic. The temperatures at A, B and C are 400 K, 800 K and 600 K respectively. Choose the correct statement

An ideal gas is taken through the cycle A→B→ C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

Which of the following graphs correctly represents the variation of β= -(dV/dP)/V with P for an ideal gas at constant temperature

In a process, temperature and volume of one mole of an ideal monoatomic gas are varied according to the relation VT = K , where K is a constant. In this process the temperature of the gas is increased by ΔT. The amount of heat absorbed by gas is (R is gas constant)

A carnot engine, whose efficiency is 40%, takes in heat from a source maintained at a temperature of 500 K. It is desired to have an engine of efficiency 60%. Then, the intake temperature for the same exhaust (sink) temperature must be

A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used 60 J of heat flows into the system and 30 J of work is done by the system. If path ADB is used work done by the system is 10 J. The heat flow into the system in path ADB is

Two Carnot engines A and B are operated in series. The first one, A receives heat at T1 (= 600K) and rejects to a reservoir at temperature T2 . The second engine B receives heat rejected by the first engine and, in turn, rejects to a heat reservoir at T3 (= 400K ) Calculate the temperature T2 if the work outputs of the two engines are equal

Three Carnot engines operate in series between a heat source at a temperature T₁ and a heat sink at temperature T4 (see figure). There are two other reservoirs at temperature T₂ and T3 as shown, with T₁ >T₂ >T3 >T4. The three engines are equally efficient if

Which of the following cannot determine the state of a thermodynamic system?

0.100 mol of an ideal gas is heated from 10 to 20°C keeping its (a) volume constant (b) pressure constant. Let ΔUa, and ΔUb, denote the change in the internal energy of the gas due to process (a) and (b) respectively. Then which of the following shall be true

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