Question

A constant pressure air thermometer gave a reading of 47.5 units of volume, when immersed in ice-cold water, and 67 units in a boiling liquid. What is the boiling point of the liquid?

(a) 100°C

(b) 112°C

(c) 125°C

(d) 135°C

The question was asked in exam.

My question is from Temperature and Specific Heat topic in division Mechanical Properties of Solids of Engineering Physics I

Answer 1

Right option is (b) 112°C

Best explanation: From Charles’s law,

V1/T1 = V2/T2

47.5/(0+273)=67/T2

T2=(67×273)/47.5=385K

T2=112°C.