Home / Unit-8 Energetics / Question
MCQ
Calcium oxide (quicklime) reacts with water to release a large amount of heat. This reaction is:
Unit-8 Energetics
A Endothermic, delta H positive
B Exothermic, delta H negative
C Endothermic, delta H negative
D Exothermic, delta H positive
Explanation

The reaction releases heat, so it is exothermic with a negative delta H value.

Related MCQs

The heat of combustion of a fuel is commonly measured using a:
Unit-8 Energetics View
In thermochemical equations, the symbol (aq) stands for:
Unit-8 Energetics View
A thermochemical equation includes all of the following EXCEPT:
Unit-8 Energetics View
For the reaction A + B -> C, delta H = +120 kJ. If the equation is doubled (2A + 2B -> 2C), the delta H becomes:
Unit-8 Energetics View
On an energy profile diagram, the energy difference between the reactants and the transition state is the:
Unit-8 Energetics View
During respiration, one mole of glucose releases about 2800 kJ of energy. This shows respiration is:
Unit-8 Energetics View