Question

If the ratio of specific heat capacities of a gas is 1.4 and its density at S.T.P. is 0.09 kg/m². Calculate the values of specific heat capacities at constant pressure and at constant volume. 14​

Answer 1

Answer:

γ−1

PV

Explanation:

​  

At constant pressure, change in internal energyΔU=nC  

v

​

ΔT

Now,  

C  

v

​

 

C  

p

​

 

​

=γ

⇒1+  

C  

v

​

 

R

​

=γ

⇒C  

v

​

=  

γ−1

R

​

 

Using Charle's law, final temperature=2\times initial temperatue=2T

Thus,  ΔU=nC  

v

​

(2T−T)=nC  

v

​

T=  

γ−1

nRT

​

=  

γ−1

PV

​