HC Verma - Concepts of Physics Part 2

Book: HC Verma - Concepts of Physics Part 2

Chapter: 27. Specific Heat Capacities of Gases

Subject: Physics - Class 12th

Q. No. 15 of Exercises

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15

In Joly’s differential steam calorimeter, 3g of an ideal gas is contained in a rigid closed sphere at 20°C. The sphere is heated by steam at 100°C and it is found that an extra 0.095 g of steam has condensed into water as the temperature of the gas becomes constant. Calculate the specific heat capacity of the gas in J g–1 K–1. The latent heat of vaporization of water = 540 cal g–1.

Here,


m1 = Mass of gas present = 3 g, θ1 = 20°C, θ2 = 100°C


m2 = Mass of steam condensed = 0.095 g, L = 540 Cal/g = 540 × 4.2 J/g


In Joly’s differential steam calorimeter,




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