Energy
the capacity to supply heat or do work
energy
matter undergoing chemical reactions and physical changes that can release or absorb heat
exothermic and endothermic reactions
Q =
heat
The transfer of thermal energy between two bodies at different temperatures
heat
The study of heat energy associated with chemical reactions and phase changes, such as melting and boiling
What is thermochemistry
What are the 3 units of energy
joules, kilojoules, calories
a change that releases heat is called a ___ process
exothermic
Δ T=
change in temperature
increases the thermal energy of one body and decreases the thermal energy of the other
heat flow
enthalpy
If something is melting:
what states is it moving from and towards
is there input or output of heat
is q + or -
endo or exo
solid to liquid
input
+
endo
a change that absorbs heat is a ___ process
endothermic
the ___ of a body of matter is the quantity of heat it absorbs or releases when it experiences a temperature change
heat capacity
When two substances are in contact, in which direction does the thermal energy flow
high temp to low temp
During a chemical or physical change, ___ can be neither created nor destroyed, although its form can ___
What is energy, change
If something is freezing:
what states is it moving from and towards
is there input or output of heat
is q + or -
endo or exo
liquid to solid
output
negative
exo
What is the formula for calculating heat?
q = mcΔT
the ___ of a substance is the quantity of heat requred to raise 1 gram of a substance by 1 degree
specific heat capacity
Describe thermal equilibrium
when both substances are at the same temperature and their molecules have the same average kinetic energy
Thermal energy is a type of ___ associated with the random motion of atoms and molecules
kinetic energy
What is the formula for heat capacity
C = q/ΔT
What is the value for q if a substance gains vs loses thermal energy
positive, negative
What type of property is heat capacity vs specific heat capacity
extensive property, intensive property
A ___ is defined as the amount of energy used when a force of 1 newton moves an object 1 meter
joule
Temperature is a quantitative measure of
hot or cold