 # A monoatomic gas undergoes a process in which the ratio of P to V at any instant is constant and equals to 1. What is the molar heat capacity of the gas?? Options: A)4R/2 B)3R/2 C)5r/2 D)0

13 years ago

## DIS IZ AN ISOTROPIC PROCESS (defiined as process in which PV*=constant hereV*meansV ki power x)AND FORMULA OF MOLAR HEAT CAPACITY FOR SUCH A PROCESS IZ=R/y-1-R/x-1 y=5/3 for a monoatomic ideal gas and here P/V=CONSTANT SO x=-1 so ANSWER=3R/2-(-R/2)=4R/2. U CAN FIND DERIVATION OF DIS FORMULA IN HCV . PLZ REPLY ME IF D ANSWER IS CORRECT OR NOT.

13 years ago

Thanks very much Mohit. The answer is A) 4R/2. But could you please tell me what you exactly meant by HCV and where exactly to look.

13 years ago

HI

HCV means Physics book of HC VERMA ,refer dere 2 get dis formula ,available may b in ur school library or buy this book as dis iz d best book 2 refer for IIT-JEE  refer 2 volume-2 of HCV.U will surely enjoy reading dat book .U may also refer to some physical chemistry book.

BEST OF LUCK 2 U FOR UR ENTRANCE EXAMS.

4 years ago
For a polytropic process
Cm = Cvm + R/(1-x)
where x is the polytropic index. Given that
P/V =1 hence x=-1,
Therefore Cm= 3R/2 + R/[1-(1)]  = 2R.