CHEMISTRY QUIZ 3.1 REVIEW
QUESTION & CORRECT ANSWERS FALL
2025/26 (MCQS, MULTI RESPONSE,
SHORT ANSWERS, ESSAY)
Study ace Smart
DECEMBER 1, 2025
, Chemistry Quiz 3.1 Review Question & Correct Answers Fall 2025/26
(MCQs, Multi Response, Short Answers, Essay)
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. How do calories and joules differ from one another?
a.
They are two different measures of amounts of energy. b. Calories measure energy and joules measure
heat flow.
c. Joules are used in chemistry and calories are used in biology.
d. Joule and calorie are two different names for the same unit of energy.
____ 2.
One mole of hydrogen is burned in oxygen to produce water in the gas phase, H = 285.8 kJ. What is the
energy change when 1 mole of water, in the gas phase, decomposes to form hydrogen and oxygen?
a. 142.9 kJ of heat is absorbed.
b. 285.8 kJ of heat is absorbed.
c. 142.9 kJ of heat is released.
d. 285.8 kJ of heat is released.
____ 3. How many kilocalories of heat are required to raise the temperature of 225 g of aluminum from 20 C to 100
C? (specific heat of aluminum = 0.21 a.
0.59 kcal
b. 3.8 kcal
c. 38 kcal
d. 85 kcal
____ 4. Which of the following is a factor in the heat capacity of an object?
mass a.
b. enthalpy
c. shape
d. potential energy
____ 5. A 100 gram piece of heated iron cools from 50° to 20°C. How much heat is released to the surroundings?
a. 300 J of heat are released to the surroundings.
b. 300 cal of heat are released to the surroundings.
c. The amount of heat cannot be calculated because the heat capacity is not known.
d. The amount of heat cannot be calculated because there is no closed system.
QUESTION & CORRECT ANSWERS FALL
2025/26 (MCQS, MULTI RESPONSE,
SHORT ANSWERS, ESSAY)
Study ace Smart
DECEMBER 1, 2025
, Chemistry Quiz 3.1 Review Question & Correct Answers Fall 2025/26
(MCQs, Multi Response, Short Answers, Essay)
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. How do calories and joules differ from one another?
a.
They are two different measures of amounts of energy. b. Calories measure energy and joules measure
heat flow.
c. Joules are used in chemistry and calories are used in biology.
d. Joule and calorie are two different names for the same unit of energy.
____ 2.
One mole of hydrogen is burned in oxygen to produce water in the gas phase, H = 285.8 kJ. What is the
energy change when 1 mole of water, in the gas phase, decomposes to form hydrogen and oxygen?
a. 142.9 kJ of heat is absorbed.
b. 285.8 kJ of heat is absorbed.
c. 142.9 kJ of heat is released.
d. 285.8 kJ of heat is released.
____ 3. How many kilocalories of heat are required to raise the temperature of 225 g of aluminum from 20 C to 100
C? (specific heat of aluminum = 0.21 a.
0.59 kcal
b. 3.8 kcal
c. 38 kcal
d. 85 kcal
____ 4. Which of the following is a factor in the heat capacity of an object?
mass a.
b. enthalpy
c. shape
d. potential energy
____ 5. A 100 gram piece of heated iron cools from 50° to 20°C. How much heat is released to the surroundings?
a. 300 J of heat are released to the surroundings.
b. 300 cal of heat are released to the surroundings.
c. The amount of heat cannot be calculated because the heat capacity is not known.
d. The amount of heat cannot be calculated because there is no closed system.
