ENTHALPY AND FIRST LAW OF THERMODYDAMICS TEST QUESTIONS WITH
ANSWER’S KEY.
Note: The letter in bold is the correct answer
Read the questions carefully:
1. Energy that an object possesses by virtue of its position relative to other objects.
a. kinetic energy
b. potential energy
c. heat energy
d. light energy
2. Energy of an object due to the motion of an object.
a. chemical energy
b. heat energy
c. kinetic energy
d. potential energy
3. The SI unit of energy is
a. calorie
b. joule
c. atm
d. kg. m
4. It is an energy that is transferred from a hotter object to a colder one.
a. chemical energy
b. heat energy
c. internal energy
d. kinetic energy
5. It is the sum of all kinetic energy and potential energy of its component parts.
a. chemical energy
b. heat energy
c. internal energy
d. kinetic energy
6. Is a process in which the system absorbs heat from the surroundings.
a. exothermic
b. endothermic
c. spontaneous
d. nonspontaneous
7. Is a process in which the system releases heat to the surrounding.
a. exothermic
b. endothermic
c. spontaneous
d. nonspontaneous
8. An instrument used to measure the temperature change accompanying a process.
a. calorimeter
b. thermometer
c. speedometer
d. altimeter
9. Is a law that states that if a reaction is carried out in a series of steps, ∆H for the reaction will
be equal to the sum of the enthalpy changes for the steps.
a. First Law of Thermodynamics
b. Second Law of Thermodynamics
c. Hess Law
d. Third Law of Thermodynamics
10. Is a law which states that energy is conserved during any process. It is just transformed from
one form of energy to another form of energy.
a. First Law of Thermodynamics