WebIf its Cv, avg = 0.7 kJ/kg*K, determine its entropy change using the constant-specific-heat assumption. 0 K During a cryogenic application, liquid methane undergoes an isentropic process at 110 K. Assuing that liquid methane is incompressible and its Cavg = 3.48 … WebWhen the temperature change during a process is large and the specific heats vary nonlinearly with temperature, the constant-specific-heat assumption is preferred. Errors introduced by the constant …

Specific Heats - NASA

Webonly if the specific heats are constant. We can relate the specific heats of an ideal gas to its gas constant as follows. We write the first law in terms of internal energy, and … WebPossible assumptions include: Closed system, open system, steady state, adiabatic, no work, negligible changes in potential energy, negligible changes in kinetic energy, isothermal, constant pressure, incompressible, ideal gas, constant specific heats, internally reversible. sabite hilft helps hans

Polytropic process - Wikipedia

WebProve that the two relations for entropy change of ideal gases under the constant-specific-heat assumption (Eqs. 8–33 and 8–34) are equivalent. Starting with the second T ds relation (Eq. 8–26), obtain Eq. 8–34 for the entropy change of ideal gases under the constant-specific-heat assumption. Expert's Answer Solution.pdf Next Previous WebAssumptions: Nitrogen is an ideal gas. Nitrogen has constant specific heats. # From (Table A-2b → The specific heat ratio of Nitrogen is k = 1.395 @T avg = 450 K # From the isentropic relation of an ideal gas under constant specific heat assumption. 2= 1( 2 1) − 1 =(300 )(1000 𝑎 100 𝑎) 0.395 1.395 =576 WebIt has been assumed that the rate of change for the temperature of both fluids is proportional to the temperature difference; this assumption is valid for fluids with a constant specific heat, which is a good description of fluids changing temperature over a … is herbal tea really tea