For temperatures between 300 and 1000 K and at 1 atm, the molar specific enthalpy of O2 is expressed by the following polynomial:
h(O2)=R(subscript U)(3.697578 T + 3.0675985x10^-4 T^2 -4.19614x10^-8 T^3 +4.4382025x10^-12 T^4 - 2.27287x10^-16 T^5 -1233.9301)
where h is expressed in kJ/kmol and T in kelvins. Determine the constant-pressure molar-specific heat c(subscript p) at 500 K and at 1000 K. Compare the magnitudes of the values at the two temperatures and discuss. Also determine c(subscript p), the constant-pressure MASS-specific heat.