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Chemical Energetics Thermochemistry Test Online MCQs

Test Name Chemical Energetics Thermochemistry Test
Subject Chemistry
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
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Attempt Chemical Energetics Thermochemistry Test Online MCQs to increase knowledge about the Chemical energetics and Thermochemistry and their mechanism. Get preparation of all the entrance tests, competitive tests, medical tests, engineering tests, admission tests and competitive tests.

Chemical Energetics Thermochemistry Test Online MCQs


1. Two mole of an ideal gas are compressed isothermally (100°C) and reversibly from a pressure of 10 atm to 25 atm, then the free energy change is:


Question 1 of 15

2. Calculate change in internal energy if ∆H= -92.2 kJ, P = 40 atm and ∆V = - 1L.


Question 2 of 15

3. One mole of an ideal gas for which C= (3/2)R is heated reversibly at a constant pressure of 1 atm from 25°C to 100°C. The ∆H is:


Question 3 of 15

4. For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ∆U and w corresponds to:


Question 4 of 15

5. In the exothermic reaction, the enthalpy of reaction is always:


Question 5 of 15

6. For the equilibrium H₂O(l) H₂O(g) at 1 atm and 298 K:


Question 6 of 15

7. During isothermal expansion of the mole of an ideal gas from 10 atm top 1 atm at 273 K, the work done is [gas constant = 2]:


Question 7 of 15

8. The internal energy of a substance:


Question 8 of 15

9. How much energy is released when 6 moles of octane is burnt in air? Given ∆H⁰f for CO₂(g), H₂O(g) and C₈H₁₈(l) respectively are -490, - 240 and + 160 J/mol.


Question 9 of 15

10. A gas expands isothermally against a constant external pressure of 1 atm from a volume of 10 dm³ to a volume of 20 dm³. It absorbs 300 J of thermal energy from its surrounding. The ∆U is:


Question 10 of 15

11. For a reaction to be spontaneous at all temperatures


Question 11 of 15

12. ∆Ssurr for an exothermic reaction is


Question 12 of 15

13. The heat of reaction for: C₁₀H₈(s) + 12O₂(g) 10CO₂ (g) + 4H₂O(l) at constant volume is – 1228.2 kcal at 25°C. The heat of reaction at constant pressure and same temperature is:


Question 13 of 15

14. The potential energy diagram for a reaction RP is given below




H° of the reaction corresponds to the energy:

Question 14 of 15

15. One gram sample of NH₄NO₃ is decomposed in a bomb calorimeter, the temperature of the calorimeter increases by 6.12 K. The heat capacity if the system is 1.23 kJ/g/deg. What is the molar heat of decomposition for NH₄NO₃?


Question 15 of 15


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