The temperature of 5 moles of a gas at constant volume is changed from 100 ° C to 120 ° C . The change in internal energy is 80 J . The total heat capacity of the gas at constant volume (in J K - 1 ) is

Question

The temperature of 5 moles of a gas at constant volume is changed from 100 ° C to 120 ° C . The change in internal energy is 80 J . The total heat capacity of the gas at constant volume (in J K - 1 ) is, 8, 4, 0.8, 0.4

MARKS App · Accepted Answer

Number of moles n = 5 mol , T 1 = 100 ° C T 2 = 120 ° C , ∆ U = 80 J Rise in temperature ∆ T = 120 - 100 = 20 ° C ∆ U = m s ∆ T 80 = 5 × M 0 × s × 20 , where M 0 is the molar mass The heat capacity is C = 5 M 0 s = 4 J K - 1

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