The temperature of an ideal gas is kept constant as it expands. The gas does external work. During this process,the internal energy of the gas

What is the value of the specific heat of a gas during an isothermal process?

In an isothermal process,which statement is wrong?

If an ideal gas is compressed isothermally, which of the following statements is true?

Two identical containers $A$ and $B$ with frictionless pistons contain the same ideal gas at the same temperature and the same volume $V$. The mass of the gas in $A$ is ${m_A}$ and that in $B$ is ${m_B}$. The gas in each cylinder is now allowed to expand isothermally to the same final volume $2V$. The changes in the pressure in $A$ and $B$ are found to be $\Delta P$ and $1.5 \Delta P$ respectively. Then:

$Assertion :$ The isothermal curves intersect each other at a certain point.
$Reason :$ The isothermal change takes place slowly,so,the isothermal curves have very little slope.