Question

A given quantity of an ideal gas at pressure P and absolute temperature T. The isothermal bulk modulus of the gas is ___________

(a) 2/3 P

(b) P

(c) 3/2 P

(d) 2P

I had been asked this question by my school principal while I was bunking the class.

Question is taken from Gases and Reactions in portion Kinetic Theory of Gases of Engineering Physics I

Answer 1

Correct answer is (a) 2/3 P

For explanation I would say: At a given temperature,

P∆V+V∆P=0

P=V∆P/∆V=(∆P/∆V)/V=Isothermal bulk modulus.