Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the equation: CO2(s)→CO2(g). When dry ice is added to warm water, heat from the water causes the dry ice to sublime more quickly. The evaporating carbon dioxide produces a dense fog often used to create special effects. In a simple dry ice fog machine, dry ice is added to warm water in a Styrofoam cooler. The dry ice produces fog until it evaporates away, or until the water gets too cold to sublime the dry ice quickly enough. Suppose that a small Styrofoam cooler holds 15.0 Lof water heated to 89 ∘C. Part A Use standard enthalpies of formation to calculate the change in enthalpy for dry ice sublimation. (The ΔH∘ffor CO2(s)is -427.4 kJ/mol.)Express your answer using three significant figures. ΔH∘rxnΔ H r x n ∘ = 55.8 kJ
Dry ice is solid carbon dioxide. Instead of melting, solid carbon dioxide sublimes according to the equation:
CO
2
(s)→
CO
2
(g)
. When dry ice is added to warm water, heat from the water causes the dry ice to sublime more quickly. The evaporating carbon dioxide produces a dense fog often used to create special effects. In a simple dry ice fog machine, dry ice is added to warm water in a Styrofoam cooler. The dry ice produces fog until it evaporates away, or until the water gets too cold to sublime the dry ice quickly enough. Suppose that a small Styrofoam cooler holds 15.0
L
of water heated to 89
∘
C
.
Part A
Use standard enthalpies of formation to calculate the change in enthalpy for dry ice sublimation. (The
Δ
H
∘
f
for
C
O
2
(s)
is -427.4
kJ/mol
.)
Express your answer using three significant figures.
Δ
H
∘
rxn
Δ H r x n ∘
=
55.8 kJ
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