Determine the FALSE statement regarding heat:
1) In an isolated system, heat, but not matter can be exchanged with the surroundings.
2) Molar heat capacity is defined as the amount of energy need to increase the temperature of 1 mole of a substance by 1 K.
3) A chemical reaction where q > 0 is called endothermic.
4) Heat transfer results from the exchange of energy due to a temperature gradient.
5) The heat capacity of a molecule increases with increasing complexity.