Please fill in the blanks. a) Heat is a thermodynamic function of __________ b) The internal energy of an ideal gas depends on _____________ c) According to the 1st Law of Thermodynamics, the energy of the universe is __________ d) The work done in the expansion of a gas against vacuum W= _____________ e) According to the 2st Law of Thermodynamics, the entropy of the universe is __________