Answer:
1 Answer
Stefan V.
Jan 29, 2017
12 kJ
Explanation:
The molar latent heat of fusion, which is an alternative name given to the enthalpy of fusion, tells you how much heat is required in order to convert a specific amount of a given substance, either a gram or a mole, from solid at its melting point to liquid at its melting point.
Ice is said to have a molar enthalpy of fusion equal to
Δ
H
fus
=
6.0 kJ mol
−
1
This means that in order to melt
1
mole of ice at its normal melting point of
0
∘
C
, you must supply it with
6.0 kJ
of heat.
Now, your sample of ice has a mass of
36 g
, so the first thing to do here is to convert it to moles by using the molar mass of water
36
g
⋅
1 mole H
2
O
18.015
g
=
1.998 moles H
2
O
You can now use the molar enthalpy of fusion as a conversion factor to help you figure out how much heat must be supplied to your sample
1.998
moles ice
⋅
6.0 kJ
1
mole ice
=
12 kJ
−−−−−
Explanation:
hope s hlp..
