Thermochemistry Set 1

Results

#1. Born–Haber cycle is an application of

first law of thermodynamics

second law of thermodynamics

first law of thermochemistry

Hess’s law

#2. An exothermic reaction is one in which

enthalpy of reactants and products are same

heat is absorbed by system

enthalpy of products is greater than reactants

enthalpy of reactants is lesser than products

#3. A substance under observation during an experiment

surrounding

system

state function

universe

#4. Enthalpy of neutralization is merely

heat of solution

heat of atomization (

heat of combustion

heat of formation of H2O

#5. Lattice energy of NaCl is

+ 500 kJ

– 344 kJ

– 776 kJ

– 411 kJ

#6. Standard enthalpy of Al2O3 cannot be measured because

#7. Standard enthalpy of Al2O3 cannot be measured because

it does not catch fire

it reacts with CO2

protective layer of oxide cover the surface

none of above

#8. First law of thermodynamics is represented as

D E = q + R T

D E = q + D P

D E = q + w

#9. Pumping of water uphill is

spontaneous reaction

exothermic reaction

non–spontaneous reaction

endothermic

#10. In exothermic reaction D H is

(a) positive (b) negative (c) zero (d) none of above

Finish