A. H = E – PV
B. H = F – TS
C. H – E = PV
D. None of these
Related Mcqs:
- Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?
A. 46
B. 92
C. -23
D. -92 - Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?
A. Positive
B. Negative
C. Zero
D. Infinity - The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of________________?
A. T
B. T and P
C. T, P and Z
D. T and Z - Enthalpy of a gas depends upon its___________________?
A. Temperature
B. Mass
C. Volume
D. Pressure - In the reaction, C + O2 → CO2; ΔH = – 94 kcal. What is the heat content (enthalpy) of O2 ?
A. -94 kcal
B. > -94 kcal
C. < – 94 kcal
D. Zero - High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process ?
A. Δ H = 0 and ΔS = 0
B. Δ H ≠ 0 and ΔS = 0
C. Δ H ≠ 0 and ΔS ≠ 0
D. Δ H = 0 and ΔS ≠ 0 - The total change in the enthalpy of a system is independent of the _______________________?
A. Number of intermediate chemical reactions involved
B. Pressure and temperature
C. State of combination and aggregation in the beginning and at the end of the reaction
D. None of these - The enthalpy change when ammonia gas is dissolved in water is called the heat of___________________?
A. Solution
B. Formation
C. Dilution
D. Combustion - Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a __________________?
A. Straight line
B. Sine curve
C. Parabola
D. Hyperbola - For a constant pressure reversible process, the enthalpy change (ΔH) of the system is___________________?
A. Cv.dT
B. Cp.dT
C. ∫ Cp.dT
D. ∫ Cv.dT
