How many kilojoules of heat are released when 2500 grams of gaseous ethanol at its boiling point are converted to liquid ethanol and then cooled down by 55 degrees celsius?
The molar heat of vaporization of ethanol =39.3kj/mol;
specific head of liquid ethanol= 2.26j/gxdegreesC
Please Please help I dont understand these type of problems of how to do the unit conversions properly :(
The molar heat of vaporization of ethanol =39.3kj/mol;
specific head of liquid ethanol= 2.26j/gxdegreesC
Please Please help I dont understand these type of problems of how to do the unit conversions properly :(
1 Answer
Explanation:
I was not going to touch this problem, but then I saw that you have included the relevant thermodynamic parameters, so bravo...
We interrogate TWO thermodynamics processes....
And
For
And thus energy released for
And for
And as is typical the enthalpy associated with the phase change, dwarfs the energy involved in the single phase....