# physics

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!!!!

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1. 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.

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2. Am i Correct The correct answer is 9.3 kg ?

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posted by Maryo
3. (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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4. i guess the correct answer is 9.3 kg. but i don't know how to get this answer?

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posted by Leonard

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