For the reaction , X₂O₄(l) → 2XO₂(g), ΔG is
For the reaction , X₂O₄(l) → 2XO₂(g) ΔU = 2.1 kcal, ΔS = 20 cal K⁻¹ at 300K Hence, ΔG is
Options
(a) 2.7 kcal (b) -2.7 kcal (c) 9.3 kcal (d) -9.3 […]
Thermodynamics
The coefficient of performance of a refrigerator is 5. If the temperature inside
The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20⁰C, the temperature of the surroundings to which it rejects heat is
Options
(a) 11⁰C (b) 21⁰C (c) […]
An ideal gas is compressed to half its initial volume by means of several processes.
An ideal gas is compressed to half its initial volume by means of several processes. Which of the progress results in the maximum work done on the gas?
Options
(a) Isochoric (b) Isothermal […]
Figure below shows two paths that may be taken by a gas to go from a state A
Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400 J of heat is added to the system and […]
A thermodynamic system undergoes cyclic process ABCDA as shown in figure
A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system in the cycle is
Options
(a) P₀ V₀ (b) 2P₀ V₀ (c) P₀ V₀/2 (d) zero
Correct […]
A monoatomic gas at a pressure P, having a volume V expands isothermally
A monoatomic gas at a pressure P, having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is (Take γ=5/3)
Options […]
Which of the following is always feasible
Which of the following is always feasible
Options
(a) ΔH = TΔS (b) ΔH (+ve),TΔS(-ve) and ΔH>TΔS (c) ΔH(-ve),TΔS(+ve) and ΔH< TΔS (d) ΔH(-ve), TΔS(-ve) and ΔH>TΔS
Correct Answer:
ΔH(-ve),TΔS(+ve) and ΔH< TΔS […]
If in a container no mass and no heat exchange occurs then it constitutes a
If in a container no mass and no heat exchange occurs then it constitutes a
Options
(a) closed system (b) open system (c) isolated system (d) imaginary system
Correct Answer:
isolated system
Explanation:
An […]
The combustion enthalpies of carbon , hydrogen and methane are -395.5 kJ mol⁻¹
The combustion enthalpies of carbon , hydrogen and methane are -395.5 kJ mol⁻¹,-284.8 kJ mol⁻¹ and -890.4 kJ mol⁻¹ respectively at 25⁰ C. The value of standard formation enthalpies of methane at that temperature is […]
In an isobaric process, the ratio of heat supplied to the system (dQ)
In an isobaric process, the ratio of heat supplied to the system (dQ) and work done by the system (dW) for diatomic gas is
Options
(a) 1:1 (b) 7:2 (c) 7:5 (d) 5:7