WorksheetsUnit 3 Boss Battle
Total questions: 12
Worksheet time: 17mins
H-H = 436
Cl-Cl = 242
H-Cl = 431
What is the enthalpy change for the decomposition of hydrogen chloride?
2 HCl --> H2 + Cl2
The enthalpy change for the reaction between hydrochloric acid and sodium hydroxide is −56 kJ/mol. Therefore ...
the reaction is exothermic and the temperature rises
the reaction is exothermic and the temperature falls
the reaction is endothermic and the temperature rises
the reaction is endothermic and the temperature falls
What happens when chemical bonds are broken?
Energy is released
An explosion occurs
An exothermic process take place
An endothermic process take place
Heat is measured in
Joules
grams
°C
J/g °C
The specific heat of aluminum is 0.21 J/g°C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?
-105 J
10.5 J
1.05 J
105 J
The specific heat(c) of copper is 0.39 J/g°C. What is the temperature change(∆T) when 100 Joules of heat(Q) is added to 20 grams?
12.82 °C
24.12°C
351 °C
780 °C
How much heat is needed to raise the temperature of 0.3g of copper from 25oC to 30oC. (Specific Heat of Copper= 0.38 J/g°C)
0.57 J
0.33 J
2.3 J
4.5 J
