The internal energy of a gas is given by U = 1.5pV. It expands from 10

1.	The internal energy of a gas is given by U = 1.5pV. It expands from 100cm3 to 200cm3 against a constant pressure of 1.0 x 105Pa. Calculate the heat absorbed by the gas in the process.
Answer» U = 1.5pV P = 1 × 10⁵ Pa dV = (200 – 100)cm³ = 100cm³ = 10^–4m³ dU = 1.5 × 10⁵× 10^–4 = 15 dW = 10⁵ × 10^–4 = 10 dQ = dU + dW = 10 + 15 = 25J

The internal energy of a gas is given by U = 1.5pV. It expands from 100cm3 to 200cm3 against a constant pressure of 1.0 x 105Pa. Calculate the heat absorbed by the gas in the process.

Answer»

U = 1.5pV P = 1 × 10⁵ Pa
dV = (200 – 100)cm³ = 100cm³ = 10^–4m³
dU = 1.5 × 10⁵× 10^–4 = 15
dW = 10⁵ × 10^–4 = 10
dQ = dU + dW = 10 + 15 = 25J