Grade 12 Chemistry Exam
Calorimeter - correct answer-Device used to measure heat of reaction.
Chemical Potential Energy (CPE) - correct answer-Stored energy in the bonds between
atoms in a molecule.
Endothermic Reaction - correct answer-- The system absorbs energy from the surrounding
- This causes the system to be hotter (energy gain) and the surrounding to be cooler (energy
loss).
- Delta H is positive; on reactants side
Enthalpy ( Symbol H) - correct answer-The total energy of a system; both KINETIC and
POTENTIAL.
Exothermic reactions - correct answer-- The system releases energy to the surrounding
- This causes the system to be cooler (energy loss) and the surrounding to be hotter (energy
gain).
- Delta H is negative; on products side
Heat (Q) - correct answer-The transfer of thermal energy from a HOT object to a COLD
object.
Molar Enthalpy (Hm) - correct answer-The enthalpy change of ONE MOLE of a substance
undergoing a change.
Specific Heat Capacity - correct answer-The amount of energy needed to increase the
temperature of one gram of a substance by one degree Celsius.
Surroundings - correct answer-Everything outside of the system we are studying.
System - correct answer-All of the chemical components that are involved in a chemical
reaction (the reactants, the products and whatever solvents they are in).
Temperature - correct answer-The average kinetic energy of the particles in a substance.
Thermal Energy - correct answer-The total kinetic energy of the particles in a substance due
to their motion.
Thermal Kinetic Energy - correct answer-Motion of particles (either atoms or molecules).
Thermochemistry - correct answer-Branch of chemistry that studies the energy chamges in
chemical reactions.
Thermometer - correct answer-Device used to measure the temperature difference before
and after the reaction.
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