What is the amount of energy needed to increase the temperature of 2.5 mole of water...
What is the amount of energy needed to increase the temperature of 2.5 mole of water from 20oC to 100oC. Cpwater = 9R
Homework Answers
We know Heat required to rais the temperature (q) =
m*Cp*
T
m=moles= 2.5 mole
Cp = 9R = 8.314J/molK * 9 = 74.826 J/molK .
T = 100-20 =
80oC = 80 K
q = 2.5*74.826*80 = 14965.2 J = 14.9652 kJ
thus to increase the temprature of 2.5mol of water we need 14.9652 kJ of energy.
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