What is an ideal gas? When 17.75g of Cl2 gas is filled into a 3-L closed container at 27C, the intemal pressure of the container increased to 1.6 atm. Determine whether Cl2 gas behaves as an ideal gas at this condition. State the conditions when a gas deviates from an ideal behavior. Explain your answer. (10 marks) What is vapour pressure of a liquid? Explain why vaporization occurs only on the surface of a liquid before the boiling peint temperature is reached