Question

An ideal gas A and a real gas B have their volumes increased from V to 2V under isothermal conditions. The increase in internal energy ____________.

विकल्प

• will be same in both A and B

• will be zero in both the cases

• of B will be more than that of A

• of A will be more than that of B

Answer 1

An ideal gas A and a real gas B have their volumes increased from V to 2V under isothermal conditions. The increase in internal energy of B will be more than that of A.

Explanation:

In ideal gas, by definition, there is no interaction between particles, no intermolecular forces. So pressure change at constant temperature does not change internal energy i.e.,`Delta "U" = 0` But real gases have interactions i.e., attraction between molecules at low pressure and repulsion at high pressure. Thus, even if temperature is constant, change in pressure changes their internal energy.

`therefore Delta "U" ne 0`