What happens to the change in internal energy of a gas during adiabatic expansion?

The variables which determines the thermodynamic behaviour of a system are called thermodynamic variables. what happens to the internal energy of a gas during an adiabatic expansion?

The change in internal energy of two moles of a gas during adiabatic expansion is found to be -100 Joule. The work done during the process is

The change in internal energy of two moles of a gas during adiabatic expansion is found to be -100 Joule. The work done during the process is

Does the internal energy of an ideal gas change in an adiabatic process ?