Chapter 16 Test Continued...
9. Use the equations shown below to determine
the enthalpy for the final reaction:
(1)3CO2 + 4 H2O(l)=>C3H8(g) + 5O2{g} q=3108KJ
(2)C(graphite) + O2=>CO2 q=-552KJ
(3)C3H8(g)=>3 C(graphite) + 4H2(g) q=146KJ
H2O(l)=>H2(g) + 1/2O2(g) q=?

a. 765 kJ
b. 400 kJ
c. 6 kJ
10. What is the law of disorder?
a. the measure of the disorder or randomness of the particles that make up a system
b. the tendancy toward disorder or randomness
c. energy that is availible to do work
11.In which case can you predict if the change in entropy is positive or negative by examining the equation for a reaction or process?

a. the dissolving of a gas in a solvent always results in a decrease in entropy
b. mixing a carbon compound with a hydrogen compound always results in a decrease in entropy
c. a decrease in the mass of a substance always in accompanied by a increase in the planned motion of its particles
Congratulations on finishing the test!
Now check your answers to see if you have skills!
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