Physics: Thermodynamics


41. Question

When a system is taken from state i to state f along the path iaf, it is found that Q =50 cal and W = 20 cal. Along the path ibf Q = 36 cal. W along the path ibf is




Answer
42. Question

A gas can be taken from A to B via two different processes ACB and ADB.

phy-themo-q1

When path ACB is used 60 J of heat flows into the system and 30J 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 :




Answer
43. Question

A perfect gas is compressed to ¼ of its original volume. The initial pressure of the gas is 2atm. If compression is adiabatic, then final pressure is (γ = 1.5) –

[RPET – 1993]




Answer
44. Question

For a certain mass of the gas, the isothermal relation between P and V are shown by the graph (i) and (ii) at Kelvin temperatures T1 and T2 respectively –

[RPET – 1993]




Answer
45. Question

In an isochoric process –

[RPET – 1993]




Answer