Chemical Engineering Thermodynamics Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)? Air cycle Carnot cycle Ordinary vapour compression cycle Vapour compression with a reversible expansion engine Air cycle Carnot cycle Ordinary vapour compression cycle Vapour compression with a reversible expansion engine ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Thermodynamics As the time is passing, entropy of the universe Data insufficient, can't be predicted Is increasing Is decreasing Remains constant Data insufficient, can't be predicted Is increasing Is decreasing Remains constant ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Thermodynamics At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) μ° + R/T lnf μ°+ R lnf μ° + T lnf μ° + RT ln f μ° + R/T lnf μ°+ R lnf μ° + T lnf μ° + RT ln f ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Thermodynamics The accentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr⁻¹ = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of accentric factor is always > 2 > 1 < 1 < 3 > 2 > 1 < 1 < 3 ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Thermodynamics The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is Less pronounced Data insufficient, can't be predicted More pronounced Equal Less pronounced Data insufficient, can't be predicted More pronounced Equal ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Thermodynamics The expression for entropy change given by, ΔS = - nR ln (P₂/P₁), holds good for Expansion of a real gas Reversible isothermal volume change Heating of an ideal gas Cooling of a real gas Expansion of a real gas Reversible isothermal volume change Heating of an ideal gas Cooling of a real gas ANSWER DOWNLOAD EXAMIANS APP
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