BSC 1010 Exam 1 Review Handout

SI Leader: Debbie Thomas Exam 1 Review

CHM 2046
Instructor: Sempertegui

Chapter 5


 Exothermic vs. Endothermic
1. Which of the following are exothermic processes?
I. Hydrochloric acid and water mixing
II. The sublimation of dry ice
III. A melting ice cream cone
a. I only b. II only c. III only d. I and III e. I, II, and III

2. When a solution of aqueous KOH is made, the beaker becomes warm to
the touch. Which of the following statements is/are INCORRECT?
a. The system is gaining thermal energy
b. Energy is transferred as heat from the solution to the beaker
c. The dissolution of KOH in water is exothermic
d. None of the above

 Enthalpy
How much heat is released in the combustion of 23 g of glucose (MM =
180 g/mol)? The enthalpy of combustion of glucose is -2800 kJ/mol.
a. 358 kJ/mol
b. 642 kJ/mol
c. 764 kJ/ mol
d. None of the above
How much heat is liberated if 0.50 g of calcium phosphate reacts with
10.0 mL of 0.8 M HNO3? Ca3(PO4)2(s) + 6 HNO3(aq) → 3 Ca(NO3)2(aq) + 2
H3PO4(aq) ΔH = 134.4 kJ




 Specific Heat Capacity & Calorimetry
Exactly 19453.6 J will raise the temperature of 100.0 g of an unknown
substance from 25.0 °C to 200.0 °C. What is the specific heat capacity of
the substance?
a. 0.146 J/(g·°C)