A fixed amount of ideal gas at a temperature of 20 °C is held in an expandable container of volume 650 cm3. The gas is then heated, at constant pressure, by an amount of thermal energy, Q , which raises the temperature of the gas to 30 °C.
a. State two conditions necessary for a gas to be considered *ideal*.
b. Calculate the new volume of the gas.
c. Explain why the change in the internal energy of the gas, ΔU=Q .