## What is the difference in two specific heats Cp and Cv of one gram of helium ? The molecular weight of helium is 4. Assume that helium behaves as an ideal gas.

A.2 kcal/(kg.K)
B.8 kcal/(kg.K)
C.1 kcal/(kg.K)
D.0.5 kcal/(kg.K)

A.zero
B.positive
C.negative
D.infinity

A.0
B.1
C.2
D.3

## Specific heat of a gas for a reversible adiabatic process

A.is zero
B.is infinity
C.is negative
D.varies between zero and infinity

## Which of the following has minimum specific heats ratio

A.Hydrogen
B.Nitrogen
C.Mercury vapour
D.Sulphur dioxide

## Torr is equal to the pressure of

A.0.1 mm of Hg at 0?C in a standard gravitational field
B.1 mm of Hg at 0?C in a standard gravitational field
C.0.01 mm of Hg at 0?C in a standard gravitational field
D.0.001 mm of Hg at 0?C in a standard gravitational field

## A system is called open system if

A.only the energy crosses the system boundary
B.both energy and mass cross the system boundary
C.neither energy nor mass crosses the system boundary
D.only the mass crosses the system boundary

A.R
B.< R
C.> R
D.zero

## Generalized compressibility factor chart is a plot of

A.compressibility factor versus reduced temperature with reduced pressure as parameter
B.compressibility factor versus reduced pressure with reduced temperature as parameter
C.compressibility factor versus pressure with absolute temperature as parameter
D.compressibility factor versus absolute temperature with pressure as parameter

## The internal energy of an ideal gas depends on

A.its pressure only
B.its volume only
C.its temperature only
D.the size of its molecules only