Tag: heat and thermodynamics

Find the ratio of specific heat at constant pressure to the specific heat at constant volume for ${ NH } _{ 3 }$

An ideal gas has molar specific heat 5R/2 at constant pressure. If 300 J of heat is given to two moles of gas at constant pressure, the changes in temperature is : 

The volume of 1 kg of hydrogen gas at N.T.P. is ${ 11.2 }m^{ 3 }$. Specific heat of hydrogen at constant volume is $100.46J\quad Kg^{ -1 }{ K }^{ -1 }$.Find the specific heat at constant pressure in $Jkg^{ -1 }{ K }^{ -1 }$?

The quantity of heat (in J) required to raise the temperature of $1.0\, kg$ of ethanol from $293.45\, K$ to the boiling point and then change the liquid to vapor at that temperature is closest to 
[Given : Boiling point of ethanol $351.45\, K$
              Specific heat capacity of liquid ethanol $2.44\, J\, g^{-1}\, K^{-1}$
               Latent heat of vaporization of ethanol $855\, J \, g^{-1}$]

A real gas behaves like an ideal gas at which pressure (P) nd temperature (T)?

An ideal monatomic gas follows a law, $P\propto { T }^{ 2 }$ in addition to ideal gas law. Then molar heat capacity for the process is 

An ideal gas expands into a vacuum in a rigid vessel. As a result there is :

Which of the following statements are incorrect?
I. If $Q > 0$, heat is added to the system.
II. If $W > 0$, work is done by the system.
III. If $W = 0$, work is done by the system.

A monatomic ideal gas expands at constant pressure, with heat Q supplied. The fraction of Q which goes as work done by gas is

For a solid with a small expansion coefficient