Free energy___________________?

Byadmin March 12, 2019August 29, 2021

Free energy___________________?

A. Decreases in all spontaneous (or irreversible) processes
B. Change during a spontaneous process has a negative value
C. Remains unchanged in reversible processes carried at constant temperature and pressure
D. All A, B. and C

Thermodynamics for Chemical

A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the _____________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively) ?

A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the _____________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively) ?

A. Logarithmic
B. Arithmetic
C. Geometric
D. Harmonic

Read More A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the _____________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively) ?
Thermodynamics for Chemical

Consider the reaction, C + O2 ⇌ CO2; ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO2 → C + O2 ?

Consider the reaction, C + O2 ⇌ CO2; ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO2 → C + O2 ?

A. -94 kcal
B. +94 kcal
C. > 94 kcal
D. < -94 kcal

Read More Consider the reaction, C + O2 ⇌ CO2; ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO2 → C + O2 ?
Thermodynamics for Chemical

Gibbs free energy per mole for a pure substance is equal to the__________________?

Gibbs free energy per mole for a pure substance is equal to the__________________?

A. Latent heat of vaporisation
B. Chemical potential
C. Molal boiling point
D. Heat capacity

Read More Gibbs free energy per mole for a pure substance is equal to the__________________?
Thermodynamics for Chemical

A Carnot cycle consists of the following steps ?

A Carnot cycle consists of the following steps ?

A. Two isothermal and two isentropic
B. Two isobaric and two isothermal
C. Two isochoric and two isobaric
D. Two isothermals and two isochoric

Read More A Carnot cycle consists of the following steps ?
Thermodynamics for Chemical

The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by____________________?

The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by____________________?

A. (R/ΔH) (1/T1 – 1/T2)
B. (ΔH/R) (1/T1 – 1/T2)
C. (ΔH/R) (1/T2 – 1/T1)
D. (1/R) (1/T1 – 1/T2)

Read More The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by____________________?
Thermodynamics for Chemical

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

A. With pressure changes at constant temperature
B. Under reversible isothermal volume change
C. During heating of an ideal gas
D. During cooling of an ideal gas

Read More The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

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