Thermal Propert...

20 g of steam at $${ 100 }^{ \circ  }C$$ is passed into 100 g of ice at $${ 0 }^{ \circ  }C$$. Find the resultant temperature if specific latent heat of steam is 540 cal/g., specific latent heat of ice is 80 cal/g and specific heat of water is $$1 { cal/g }^{ \circ  }C$$

Where temperature of a gas, contained in closed vessel is increased by $$5C$$, its pressure increases by $$1%$$.The original temperature of the gas was approx i - mately:- 

p-T diagram was obtained when a given mass of gas was heated. During the heating process from the state 1 to state 2 the volume

Which of the following is incorrect relation fot a perfect gas?

Two rods having thermal conductivities in the ratio of 5:3 and having equal length length and equal cross-section are joined by face to face. If the temperature of free end of first rod is $$100^oC$$ and temperature of  free end of second rod is $$20^oc$$, then temperature of the junction, is-

Two bodies A and B have emissivities 0.5 ans 0.8 respectively. At some temperatures the two bodies have maximum spectral emissive powers at wavelength 8000 $$\mathring { A } $$ and 4000 $$\mathring { A }$$ respectively. The ratio of their emissive powers at these temperatures is : 

A solid copper cube and sphere both of same mass and emissivity are heated to same initial temperature and kept under identical conditions. What is the ratio of their initial rate of fall of temperature.

An ideal gas is expanding such that $$PT = constant$$. The coefficient of volume expansion of the gas is

$$1 $$ mole of a monoatomic gas at temperature $$T_0$$ expand slowly according to the law $$P^2 = T$$. Its final temperature is $$ 2T_o$$ , then heat supplies to the gas is

For ideal monoatomic gas,the universal gas constant R is n times molar heat capacity at constant pressure $$ C_p $$ Here n is :-