Homework Help: Chemistry

Posted by Carrie on Thursday, October 6, 2011 at 2:53pm.

Ethanol (C2H5OH) boils at a temperature of 78.3oC.
What amount of energy, in joules, is necessary to heat to boiling and then completely vaporize a 13.1 g sample of ethanol initially at a temperature of 11.1oC.

The specific heat of ethanol is approximately constant at 2.44 JK-1g-1
The heat of vaporization of ethanol is 38.56 kJ mol-1.

Chemistry - DrBob222, Thursday, October 6, 2011 at 4:22pm
q1 = heat to raise T from 11.1 to 78.3 C.
q1 = mass x specific heat x (Tfinal-Tinitial).

q2 = heat to vaporize ethanol.
q2 = mass x deltaHvap.

Total = sum q1 + q2

Answer this Question

Related Questions

Chemistry - Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of ...
Chemistry - Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of ...
college chem - Ethanol (C2H5OH) boils at a temperature of 78.3oC. What amount of...
Chemistry - How much heat is required to convert 32.5 grams of ethanol at 28 C ...
Chemistry - A 15.0g sample of liquid ethanol, C2H5OH, absorbs 5.13x10^3 J of ...
CHEMISTRY HELP - 1) The specific heat of solid copper is 0.385 J/g(C). What ...
apchem - A 15.0g sample of liquid ethanol, C2H5OH, absorbs 5.13x10^3 J of heat ...
chemestry - Calculate the heat released (in joules) from the condensation of 25....
Chemistry - Search: How much energy (in Kj) is relased when 25.0g of ethanol ...
Chemistry - Ethanol boils at a temp. of 78.29 degrees C. What amount of energy, ...

For Further Reading

First Name:
School Subject:
Answer: