Which of the following is correct regarding the internal energy of a substance?

$10$ moles of an ideal gas confined to a volume of $10 \, L$ is released into the atmosphere at $300 \, K$ where the pressure is $1 \, bar$. The work done by the gas is ....$L \, bar$
$(R = 0.083 \, L \, bar \, K^{-1} \, mol^{-1})$

An ideal gas is allowed to expand from $2 \ dm^3$ to $6 \times 10^{-3} \ m^3$ against a constant external pressure of $1 \ bar$. The work done in $kJ$ is (in $kJ$)

$X$ is an extensive property and $x$ is an intensive property of a thermodynamic system. Which of the following statement$(s)$ is (are) correct?

The heat content of a system is called

An adiabatic process is .................