SCH4U - Thermochemistry unit test
Question and answers verified to pass
2025
kinetic energy - correct answer energy of motion
Temperature - correct answer measures average kinetic energy (speed of
particles)
potential energy - correct answer energy in the bonds
what happens to the energy when bonds FORM - correct answer energy is
released (takes energy to break the reactant bonds)
what happens to energy when bonds BREAK - correct answer energy is
absorbed
thermal energy - correct answer kinetic and potential energy in a chemical
system (products and reactants)
what is thermal energy also called - correct answer enthalpy
heat - correct answer movement of thermal energy
how does heat travel - correct answer collisions between fast (hot) and slow
(cold) particles/atoms
, when does heat transfer STOP - correct answer when objects are at the
same temperature (thermal equilibrium)
exothermic - correct answer heat is released (to surroundings)
what has MORE bond energy in EXOthermic - correct answer reactants
endothermic - correct answer heat is absorbed (from surroundings)
what has MORE bond energy in ENDOthermic - correct answer products
specific heat capacity - correct answer how much energy it takes to increase
1 gram of something by 1 degree C
units of specific heat capacity - correct answer J/g°C
specific heat capacity of water - correct answer 4.184 J/gC
how is calorimetry used - correct answer to find thermal energy change
open system - correct answer matter and energy can go in and out
closed system - correct answer energy can move in and out but matter can't
isolated system - correct answer matter and energy can't move in and out
is there such thing as a 100% isolated system - correct answer no
Question and answers verified to pass
2025
kinetic energy - correct answer energy of motion
Temperature - correct answer measures average kinetic energy (speed of
particles)
potential energy - correct answer energy in the bonds
what happens to the energy when bonds FORM - correct answer energy is
released (takes energy to break the reactant bonds)
what happens to energy when bonds BREAK - correct answer energy is
absorbed
thermal energy - correct answer kinetic and potential energy in a chemical
system (products and reactants)
what is thermal energy also called - correct answer enthalpy
heat - correct answer movement of thermal energy
how does heat travel - correct answer collisions between fast (hot) and slow
(cold) particles/atoms
, when does heat transfer STOP - correct answer when objects are at the
same temperature (thermal equilibrium)
exothermic - correct answer heat is released (to surroundings)
what has MORE bond energy in EXOthermic - correct answer reactants
endothermic - correct answer heat is absorbed (from surroundings)
what has MORE bond energy in ENDOthermic - correct answer products
specific heat capacity - correct answer how much energy it takes to increase
1 gram of something by 1 degree C
units of specific heat capacity - correct answer J/g°C
specific heat capacity of water - correct answer 4.184 J/gC
how is calorimetry used - correct answer to find thermal energy change
open system - correct answer matter and energy can go in and out
closed system - correct answer energy can move in and out but matter can't
isolated system - correct answer matter and energy can't move in and out
is there such thing as a 100% isolated system - correct answer no
