WorksheetsERHS Chem CK-12 - Chapter 12 - Thermochemistry
Total questions: 10
Worksheet time: 19mins
H2 + 2 C + N2 + energy --> 2 HCN
Is this reaction endothermic or exothermic?
Endothermic
Exothermic
The following graph shows a reaction that is:
endothermic
exothermic
How much heat does it take to change 100.0 grams of ice at its freezing point to a liquid, then warm it to room temperature (20.0˚C)? (The ΔHfus = 6.01 kJ/mol and the ΔHvap = 40.67 kJ/mol)
41.7 kJ
8.36 kJ
33.4 kJ
8390 kJ
For the following reaction:
2 SO2 (g) + O2 (g) --> 2 SO3 (g)
What is the overall enthalpy using the following Enthalpies of Formation:
ΔHfo SO2 = -296.8 kJ/mol
ΔHfo SO3 = -395.7 kJ/mol
-197.8 kJ/mol
-1385 kJ/mol
-98.9 kJ/mol
-692.5 kJ/mol
C(s) + O2(g) → CO2 (g)
Entropy:
In this reaction:
N2 (g) + 3 H2 (g) --> 2 NH3 (g)
Entropy:
Decreases
Increases
Stays the Same
According to the following reaction:
Energy + N2 (g) + 2O2 (g) →2NO2 (g)
Which of the following is true?
Spontaneous
Not Spontaneous
If a reaction has a ΔH = -100kJ and an entropy ΔS = -0.080 kJ/K, which is correct for the reaction at room temperature of 293 K?
ΔG = -76.56 kJ, Spontaneous
ΔG = -76.56 kJ, Not Spontaneous
ΔG = -123.44 kJ, Spontaneous
ΔG = -123.44 kJ, Not Spontaneous
