In joly`s differential steam calorimeter, $3$ g of an ideal gas is contained in a rigid closed sphere at $20$ The sphere is heated by steam at $100$ and it is found that an extra

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Solution

For Joly’s differential steam calorimeter,
$C v = m 2 L m 1 (θ 2 - θ 1)$ ,
where
m₂= mass of steam condensed
m₂ = 0.095 g
Latent heat of vapourization, L = 540 cal/g = 540 × 4.2 J/g
m₁ = mass of gas present
m₁ = 3 g
Initial temperature, θ₁ = 20°C
Final temperature, θ₂ = 100°C
⇒ $C v = 0.095 \times 540 \times 4.23 \times (100 - 20) = 0.89$
$= 0.9 J / g - K$

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