Question

A certain gas occupies 200 ml of volume at 2 bar pressure at hundred degrees Kelvin. How much volume does it occupy at 5 bar pressure and 200 degrees Kelvin?

(a) 200 ml

(b) 160 ml

(c) 240 ml

(d) 320 ml

This question was posed to me in final exam.

Query is from States of Matter in chapter States of Matter of Chemistry – Class 11

Answer 1

Right answer is (b) 160 ml

The best explanation: From ideal gas law, we know that P1V1/T1 = P2V2/T2. Here we take P1 as 2 bar, V1 as 200 ml, T1 as hundred degrees Kelvin,  P2 as 5 bar and T2 as 200 degrees Kelvin, so by substituting the above values 200 x 2/100 = 5 x V2/200; V2 = 160 ml.