WorksheetsQuizizz 3 Post
Total questions: 10
Worksheet time: 5mins
Which is an example of exothermic process
Rusting iron
Ice Melting
Evaporation
Baking bread
Which is an endothermic reaction
Nuclear Fission
Rusting iron
Ice melting
Ice forming
MgCO3 (s) ⟶ MgO (s) + CO2 (g) ΔH = 117.3 kJ
What is ΔH for the reverse reaction?
117.3 kJ
-117.3 kJ
117.3 J
-117.3 J
What quantity of heat is evolved with 5.550 mol H2O(l) is formed from the combustion of H2(g) and O2(g)?
H2(g) + ½ O2(g) → H2O(l) ∆H = -285.8 kJ
285 kJ
1586 kJ
2297 kJ
51 kJ
If 1.0 mol of ammonia reacts to form nitrogen and hydrogen,
N2(g) + 3H2(g) -> 2NH3(g) ∆H = –92 kJ
what heat energy is associated with the reaction?
46 kJ and the reaction is exothermic
92 kJ and the reaction is exothermic
92 kJ and the reaction is endothermic
46 kJ and the reaction is endothermic
Given the thermochemical equation:
2NO2 (g) → 2NO(g) + O2(g) ∆H = 114 kJ
What is the ∆H for the reaction NO(g) + ½ O2(g) → NO2(g) ?
114 kJ
-114 kJ
57 kJ
-57 kJ
What is the ∆H value for an exothermic energy change?
Negative
Positive
Negative and Positive
Depends on the reactants
To produce 972 kJ of heat, how many grams of H2 must burn?
H2(g) + ½O2(g) -> H2O(g) + 243 kJ
2 g
4 g
6 g
8 g
What is the energy required to evaporate two moles of liquid water given the following equations?
2H2(g) + O2(g) → 2H2O(g) ∆H = -483.6 kJ
2H2(g) + O2(g) → 2H2O(l) ∆H = -571.6 kJ
44 kJ
88 kJ
527.6 kJ
1055.2 kJ
The addition of 9.54 kJ of heat is required to raise the temperature of 225.0 g of a liquid hydrocarbon from 20.5ºC to 45.0ºC. What is the heat capacity of this hydrocarbon?
.94 J/g ºC
1.73 J/g ºC
1.88 J/g ºC
9.42 J/g ºC
