Heat is given to an ideal gas in an isothermal process. A. Internal energy of the gas will decrease. B. Internal energy of the gas will increase. C. Internal energy of the gas will not change. D. The gas will do positive work. E. The gas will do negative work. Choose the correct answer from the options given below:
Options

Question

Heat is given to an ideal gas in an isothermal process. A. Internal energy of the gas will decrease. B. Internal energy of the gas will increase. C. Internal energy of the gas will not change. D. The gas will do positive work. E. The gas will do negative work. Choose the correct answer from the options given below:

Options

G1 Physics · Accepted Answer

For an ideal gas, internal energy depends only on temperature. In an isothermal process ΔT = 0, so ΔU = 0. Since heat is supplied, Q > 0 and from Q = ΔU + W, the gas does positive work. Therefore C and D are correct.