Question

2. Calculate the critical constants (Vc, Pc and Tc) for C2H2 using van der Waal’s constants a = 4.390 atm litre2 moles–2; b = 0.05136 litre mol–1 (R = 0.082 atm litre mol–1 K–1)​

Answer 1

Answer:

Explanation:

Calculate the critical constants of a gas whose vander Waals' constants are

a=0.715L  

2

 atm mol  

−2

 and b=0.0226L mol  

−1

 

The critical constants of gas which consists of critical temperature, critical pressure, and critical density;

Here,

a=0.715L  

2

atmmol  

−2

 and b=0.0226Lmol  

−1

 

Vc=3b=3×0.0226=0.0675L

Pc=  

27b  

2

 

a

​

=  

27×(0.0225)  

2

 

0.751

​

 =54.94atm

=54.94 atm

Answer 2

Answer:VC=0.1540liter

PC=61.63atm

Tc=15.80k

Explanation: