Thermal Propert...

One mole of an ideal gas expands against a constant external pressure of 1 atm from a volume of $$10d{ m }^{ 3 }$$ to a volume of $$30d{ m }^{ 3 }$$. What would be the work done in joules?

Half mole of an ideal monoatomic gas is heated at constant  pressure of 1 atm from $${ 20 }^{ 0 }C$$ to $${ 90 }^{ 0 }C$$ . Work done by gas is close to : ( gas constant R=8.31 j / mol -k ) 

Coefficient  of real expansion mercury is $$0.18 \times {10^{ - 3}}{/^0}C.$$ if the density of mercury at $${0^0}C$$  is $$13.6 gm/C.C,$$ then is density at $$473K$$ will be$$:$$

 An ideal gas at pressure P is adiabatically compressed so that its density becomes n times the initial value. The final pressure of the gas will be $$ ( \gamma= C_p/C_v) $$ 

N moles of a monoatomic gas is carried round the reversible rectangular cycle ABCDA as shown in the diagram. The temperature at $$A$$ is $$T _ { 0 }$$ . The thermodynamic efficiency of the cycle is

Rate of emission thermal radiation of a spherical black body of radius $$r$$ is $$H$$. It rate of cooling is $$C$$. Then 

The volume of an ideal gas is 1 litre and its pressure is equal to 72 cm of mercury column. The volume of gas is made $$ 900 cm^3 $$ by compressing it isothermally. The stress of the gas will be 

A device in which the loss of heat due to conduction, convection and radiation is minimized is

In which of the following processes, convection does not take place primarily?

An isotropic point source having radiation power P is located on the axis of an ideal circular mirror of radius r .The distance between the source and the plate is l which is much bigger than radius of the plate .Force that the light exerts on the plate is