What mass of ethyl alcohol will give up 33,000 J of energy as it cools from 27°C to -3°C?
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Specific heat capacity of Ethanol is 2440J/(kg.K)
Boiling point of ethanol is 78.37C and Melting point is -114C. Therefore the heat exchange will be on liquid state completely. No change of state occurs.
If the ethanol mass is m
Using `Q = mCtheta`
-33000 = m*2440*(-3-27) (-) is for give up energy
m = 0.45kg
So the answer is d.
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