Homework Help: physics

Posted by Helen on Sunday, February 10, 2008 at 5:46pm.

Suppose the amount of heat removed when 3.0kg of water freezes at 0 degree C were removed from ethyl alcohol and its freezing/melting point of -114 degree C. How many kilograms of ethyl alcohol would freeze?

PLEASE GIVE ME SOME HINTS!!!THANKS A LOT!!!!

physics - bobpursley, Sunday, February 10, 2008 at 7:53pm
Look up the heat of fusion of ethanol.

Heat in water freezing= masswater*Hfwater

Heat in alchol freezing=massalcohol*Hfalc

set the equal, and solve for mass of alcohol.
physics - Maryo, Wednesday, March 24, 2010 at 2:05am
Am i Correct The correct answer is 9.3 kg ?
physics - Anonymous, Sunday, May 19, 2013 at 8:06pm
(m_(water ) 〖Lf〗_water)/〖Lf〗_alcohol =m_alcohol
(3.0×(33.5×〖10〗^4 ))/((10.8×〖10〗^4 ) )=m_alcohol=9.3kg

Maryo you are right! :)

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