What mass of the ethanol is she freezing?

[MacoRules94]

A technician freezes some ethanol by removing 9.53x10^4 J of heat energy from it at its melting point. What mass of the ethanol is she freezing?

 

[rock.freak667]

A technician freezes some ethanol by removing 9.53x10^4 J of heat energy from it at its melting point. What mass of the ethanol is she freezing?

What equation do you think you need to use here? What information do you think you need to have to work out this problem?

 

[MacoRules94]

No idea

 

[rock.freak667]

No idea

Wouldn't the technician have to lower the temperature to the freezing point? Do you know an equation that related heat energy to temperature?

 

[MacoRules94]

No ida

 

[rock.freak667]

No ida

Do you know the equations Q=mcΔT and Q=ml ?

 

[MacoRules94]

Yes

Q = Mas x (umm, 4200 for water :) ) x (Tf - To)

 

[rock.freak667]

You will need to get the specific heat capacity of ethanol, the melting and freezing temperatures. Look those up.