Calculate the energy change for a pure substance over a temperature range. The following information is given for ethanol at 1 atm: boiling point = 78.40 °C AHvap (78.40 °C) = 837.0 J/g melting point = -114.5 °C AHfus(-114.5 °C) = 109.0 J/g specific heat gas = 1.430 J/g °C specific heat liquid = 2.460 J/g °C A 40.50 g sample of liquid ethanol is initially at -70.60 °C. If the sample is heated at constant pressure (P = 1 atm), calculate the amount of energy in kJ needed to raise the temperature of the sample to 101.10 °C. kj
Calculate the energy change for a pure substance over a temperature range. The following information is given for ethanol at 1 atm: boiling point = 78.40 °C AHvap (78.40 °C) = 837.0 J/g melting point = -114.5 °C AHfus(-114.5 °C) = 109.0 J/g specific heat gas = 1.430 J/g °C specific heat liquid = 2.460 J/g °C A 40.50 g sample of liquid ethanol is initially at -70.60 °C. If the sample is heated at constant pressure (P = 1 atm), calculate the amount of energy in kJ needed to raise the temperature of the sample to 101.10 °C. kj
Chemistry: An Atoms First Approach
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ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter7: Chemical Energy
Section: Chapter Questions
Problem 109AE: A sample of nickel is heated to 99.8C and placed in a coffee-cup calorimeter containing 150.0 g...
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Transcribed Image Text:Calculate the energy change for a pure substance over a temperature range.
The following information is given for ethanol at 1 atm:
boiling point = 78.40 °C
AHvap (78.40 °C) = 837.0 J/g
melting point = -114.5 °C
AHfus(-114.5 °C) = 109.0 J/g
specific heat gas = 1.430 J/g °C specific heat liquid = 2.460 J/g °C
A 40.50 g sample of liquid ethanol is initially at -70.60 °C. If the sample is heated at constant pressure (P = 1 atm), calculate the amount of energy
in kJ needed to raise the temperature of the sample to 101.10 °C.
kJ
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