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Class XI Chemistry Thermodynamics Quiz 6

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Question 1

calculate the heat of reaction CH₄ + 2O₂→CO₂ + 2H₂O? Heat of formation of CH₄ is 10J, O₂ is 5J, CO₂ is 6J and H₂O is 12J.

Question 2

Which of the following is not an endothermic reaction ?

Question 3

Estimate the average S – F bond energy in SF6.The ∆H°_ƒ values of SF₆(g), S(g) and F (g) are – 1100 ,275 and 80 kJ/mol respectively…..

Question 4

The relation between the entropy of system for an irreversible path and reversible path is:

Question 5

The volume of a gas starts at 5.0L at a temperature of 400K and a pressure of 1.12bar. if the change in entropy was 0.787 J/K/mol, what was the final volume of the gas?

Question 6

A gas absorbs 100J of heat and is simultaneously compressed by a constant external pressure of 1.5atm from 8L to 2L. ΔU=?

Question 7

A heat engine absorbs heat q₁ from a source at temperature T₁ and heat q₂ from a source at temperature T₂. Work done is found to be (q₁+ q₂). This is in accordance with:

Question 8

Combustion of glucose takes place according to the equation,
C₆H₁₂O₆ + 6O₂→ 6CO₂ + 6H₂O, ∆H = −72 k-cal
The energy required for combustion of 1.6 g of glucose is

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