Have an account?
Skip to Content
Build your own quiz
15 questions
Show Answers
See Preview
- 1. Multiple Choice
The amount of energy that is absorbed or lost by a system as heat during a process at constant pressure
a) enthalpy
b) entropy
c) specific heat
d) energy
- 2. Multiple Choice
Water vaporizes
a) increase (+)
b) decrease (-)
- 3. Multiple Choice
A filled ice cube tray is placed in the freezer so that the water freezes
a) increase (+)
b) decrease (-)
- 4. Multiple Choice
Water vapor condenses on a car's windshield overnight
a) increase (+)
b) decrease (-)
- 5. Multiple Choice
Reactants have more energy than products
a) EXO
b) ENDO
- 6. Multiple Choice
Melting, boiling, evaporation, sublimation and cooking are:
a) EXO
b) ENDO
- 7. Multiple ChoiceEndothermic reactions feelwarmcold
- 8. Multiple ChoiceExothermic reactions feelwarmcold
- 9. Multiple Choiceenergy in endothermic reactions arereleasedendedabsorbed
- 10. Multiple ChoiceHeat flows from _______ to ______ objectscooler to warmerwarmer to warmerwarmer to coolercooler to cooler
- 11. Multiple ChoiceThe enthalpy change for the reaction
C(s, graphite) + 1⁄2O2(g) --> CO(g) cannot be measured directly since some carbon dioxide is always formed in the reaction.
It can be calculated using Hess’s Law and the enthalpy changes of combustion of graphite and of carbon monoxide.
C(s, graphite) + O2(g) --> CO2 ΔH=-394 kJmol–1
CO(g) + 1⁄2O2(g) --> CO2 ΔH=-283 kJmol–1
The enthalpy change for the reaction of graphite with oxygen to give carbon monoxide is-677 kJmol–1+111 kJmol–1-111 kJmol–1+677 kJmol–1 - 12. Multiple Choice
-296.1226-11255.95 - 13. Multiple Choice-233-11.3-805-226
- 14. Multiple Choice-804.6-202.3-296.1-233.0
- 15. Multiple Choice256202233804
- Answer choicesTagsAnswer choicesTags