How much heat (kJ) is required to take a 14 g sample of solid ethanol (C₂H, OH) from -175 °C to a liquid at 26 "C? For ethanol, Cold-2.51 Jig C; Cliquid 2.44 J/g C; AH-4.9 kJ/mol; T₁--114-C.

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Chapter9: Energy And Chemistry
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Intermolecular force strength decreases or increases with larger distance between the species?
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Transcribed Image Text:Intermolecular force strength decreases or increases with larger distance between the species? O Increases Decreases
How much heat (kJ) is required to take a 14 g sample of solid ethanol (C₂H,OH) from-175 °C to a liquid at 26 "C?
For ethanol, Colid-2.51 Jig C; Cliquid-2.44 Jig C; AH-4.9 kJ/mol; T₁-114-C.
Hint: This is a three steps problem: 1)solid to solid, 2)melting, 3)liquid to liquid.
DeltaT=Tfinal-Tinitial
Pay attention to the units
Transcribed Image Text:How much heat (kJ) is required to take a 14 g sample of solid ethanol (C₂H,OH) from-175 °C to a liquid at 26 "C? For ethanol, Colid-2.51 Jig C; Cliquid-2.44 Jig C; AH-4.9 kJ/mol; T₁-114-C. Hint: This is a three steps problem: 1)solid to solid, 2)melting, 3)liquid to liquid. DeltaT=Tfinal-Tinitial Pay attention to the units
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