Ch-7 Thermochemistry Leave a Comment / By abdulslambsn@gmail.com / October 6, 2025 Welcome To Your Quiz "Ch-7 Thermochemistry" Click on "Start Quiz" To Continue... 1. Spontaneous reactions are: Reversible Irreversible Non irreversible None of these None 2. The standard heat changes occur at: 25°C and 2 atm 298 K and 1 atm 25°C and 1 mm hg 273 K and 1 atm None 3. H+ + OH- → H20 the change in enthalpy for reaction is called: Heat of reaction heat of formation Heat of neutralization Heat of combustion None 4. The enthalpy change when one mole of substance is completely burnt in excess of oxygen is called: Enthalpy of atomization Enthalpy of neutralization Enthalpy of Combustion Enthalpy of formation None 5. Enthalpy change for the reaction: CH4(g) + 202(g)→CO2(g) + 2H2O(l) is called enthalpy of: Formation Combustion Neutralization Atomization None 6. Standard enthalpies are measured at: 273 K 298K 373 K All of these None 7. The exothermic process is: Evaporation Sublimation Respiration Boiling None 8. A state function which describes together the internal energy and the product of volume is called: Enthalpy Internal energy Work Free energy None 9. Whenever a reaction is exothermic, then it means that: The heat is transferred from surroundings to the system The heat content of the reactant is greater than product The heat content of the reactants is less than those of products The heat is transferred from system to the surroundings. None 10. In a Bomb calorimeter, the reaction are carried out at constant: Pressure work volume None of these None 11. Whenever a reaction is endothermic, than it means that: Heat is transferred from surrounding to the system Heat is transferred from system to the surrounding Heat content of the products is greater than those of the reactant Heat content of the reactants is greater than those of the products None 12. The enthalpies of all elements in their standard states are: Unity Zero Always positive Always negative None 13. Which of the following is not a state function? Pressure Volume Temperature Heat None 14. Born-Haber's cycle is used to determine the: Combustion energy Decomposition energy Lattice energy Formation energy None 15. The number of fundamental ways for transferring energy into or out of system is: 1 2 3 4 None 16. Work is product of force and: Volume Time Displacement Pressure None 17. The spontaneous reaction are usually: Exothermic Fast Endothermic Both (a) and (b) None 18. At constant Volume, heat of reaction is represented by: Delta H Delta E Delta S Delta G None 19. The smallest unit of heat energy is: Calorie Joule Erg Kilo Joule None 20. At constant pressure, heat of reaction is represented by: Delta H Delta E Delta S Delta P None 21. In thermochemistry force displacement work is replaced by: Pressure volume work Pressure temperature work Temperature volume work None of these None 22. The net change in energy in a chemical reaction is same whether it takes place directly or indirectly. It is called: Henry's law Charlie's law Hess's law Graham's law None 1 out of 5 Thanks For Taking This Quiz - Please See Your Answers/Results Below After Entering Your Name & Email... Name Email Time's up
