True or false for the following statement

A mixture of air and liquid water is not a pure substance. All three phases are separated in a P-V phase diagram. Heat is recognized only as it crosses the boundary of a system. Work can be represented as a state function. Entropy can be indicated in a phase diagram. The thermodynamic temperature scale is determined by using standard machine to measure temperatures. Heat and work can be distinguished in a molecule. During a spontaneous process, entropy should decrease. At absolute zero degree, entropy is very large. Enthalpy is defined under constant volume conditions.