1. From the data below, calculate the total heat (in J) needed to convert 0.333 mol of gaseous ethanol at 300.°C and 1.00 atm to liquid ethanol at 25.0°C and 1.00 atm. Boiling point of ethanol at 1.00 atm: 78.5°C Cgas = 1.43 J/gºC AH vap = 40.5 kJ/mol Cliquid = 2.45 1/g°C Show your calculation setup clearly, and pay attention to units and sig figs in the answer.

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1. From the data below, calculate the total heat (in J) needed to convert 0.333 mol of
gaseous ethanol at 300.°C and 1.00 atm to liquid ethanol at 25.0°C and 1.00 atm.
Boiling point of ethanol at 1.00 atm: 78.5°C
Cgas = 1.43 J/gºC
AHvap = 40.5 kJ/mol
Cliquid = 2.45 J/g°C
Show your calculation setup clearly, and pay attention to units and sig figs in the
answer.
2. Assume three sig figs throughout this problem. Methane (CH₂) has a bp of -164°C
at 1 atm, and a vapor pressure of 42.8 atm at -100°C, What is the heat of
vaporization of CH₂?
Show your calculation setup clearly, and pay attention to units and sig figs in the
answer.
Transcribed Image Text:1. From the data below, calculate the total heat (in J) needed to convert 0.333 mol of gaseous ethanol at 300.°C and 1.00 atm to liquid ethanol at 25.0°C and 1.00 atm. Boiling point of ethanol at 1.00 atm: 78.5°C Cgas = 1.43 J/gºC AHvap = 40.5 kJ/mol Cliquid = 2.45 J/g°C Show your calculation setup clearly, and pay attention to units and sig figs in the answer. 2. Assume three sig figs throughout this problem. Methane (CH₂) has a bp of -164°C at 1 atm, and a vapor pressure of 42.8 atm at -100°C, What is the heat of vaporization of CH₂? Show your calculation setup clearly, and pay attention to units and sig figs in the answer.
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