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Chem 2
chapter 10
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What is thermochemistry?
Thermochemistry
is the
branch
of chemistry that deals with the study of
heat energy
changes in
chemical reactions.
What is chemical energy?
Chemical energy
is a form of
potential energy
that is stored in the
bonds
of
chemical compounds.
What is the
enthalpy
of
fusion
?
It is related to
phases
, which are the
energy
required to
convert solid
to
liquid.
ΔHfus
is what it is referred to as.
What is
heat capacity
?
The amount of
energy
needed to
raise
the
temperature
of a substance by
1 degree.
The value of ΔHrxn of a particular reaction depends on the difference in
enthalpy
between its
products
and
reactants
What is thermochemical equation?
A
representation
of a
chemical reaction
that includes the
enthalpy change.
How can the value of qcalorimeter be measured?
By measuring the
temperature change
and
heat capacity
in the
calorimeter.
what is the formula of
qcalorimeter
?
qcalorimeter
= m
×
c
× ΔT
In reactions involving
dilute aqueous solutions
, you use the
specific heat
of
liquid water.
What is the formula of ΔHrxn?
The formula for ΔHrxn is the
sum
of the
enthalpy
changes of the
products
minus the sum of the
enthalpy
changes of the
reactants.
