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Thermodynamics - Solved Example Problems for Isochoric process | 11th Physics : Heat and Thermodynamics

Chapter: 11th Physics : Heat and Thermodynamics

Solved Example Problems for Isochoric process

Heat and Thermodynamics - Thermodynamic Processes - Solved Example Problems for Isochoric process

EXAMPLE 8.21

500 g of water is heated from 30°C to 60°C. Ignoring the slight expansion of water, calculate the change in internal energy of the water? (specific heat of water 4184 J/kg.K)

Solution

When the water is heated from 30°C to 60°C,there is only a slight change in its volume. So we can treat this process as isochoric. In an isochoric process the work done by the system is zero. The given heat supplied is used to increase only the internal energy.

∆U = Q = msv ∆T

The mass of water = 500 g =0.5 kg

The change in temperature = 30K

The heat Q = 0.5×4184×30 = 62.76 kJ


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