Thermodynamics ...

The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

A uniform metal rod is used as a bar pendulum. If the room temp. rises by 10ºC and coefficient of linear expansion of the metal of the rod is 2 × 10⁶ per ºC, the period of pendulum will increase by

If the degrees of freedom of a gas molecule be f, then the ratio of two specific heats C_p/C_υ is given by

A given system undergoes a change in which the work done by the system equals the decrease in its internal energy. The system must have undergone

Fig. shows four PV diagrams. Which of these curves represent isothermal and adiabatic processes ?

Fig. shows V‒T diagram for a gas heated at constant pressure. What happens to the mass of the gas when it goes from state 1 to state 2?

An ideal gas is taken from state A to state B following three different paths as shown in P‒V diagram, Fig. Which one of the following is true?

Fig. shows a thermodynamical process on one mole of a gas. How does the work done in the process change with time?

A thermodynamical system is taken from state A to state B along ACB and is brought back to A along BDA as shown in Fig. Net work done during one complete cycle is given by area

What is the nature of change in internal energy in the following three hermodynamical processes shown in Fig. ?