Dr Nick

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About Dr Nick

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    Kaplan University
    Apr-2009 - Mar-2014

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    University of Santo Tomas
    Aug-2006 - Present

Category > Physics Posted 09 Nov 2017 My Price 11.00

The latent heat of fusion of water is 334 J/g. How many grams of ice at 0°C will melt by the addition of 3.34 kJ of heat energy?

 

You'll need 10 g. of fusion is the needed to melt a certain amount of substance. In your case you need 334 J of energy to melt 1 g of ice. If you can supply 3.34 kJ of energy you have: Q=mLf

where: Q is the heat you can supply, in this case 3.34 kJ; m is the mass of the substance, our unknown; Lf

is the latent heat of fusion of water, 334 J/g.

Rearranging you have: m=(QLf)=3.34â‹…103334=10g

Remember Latent Heat is the energy your substance needs to change its phase (solid -> liquid) and is not used to increase its temperature but to change the "connections" between the particles of the substance making it change from a solid (rigid connections) to a liquid (loose connections).

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Dr Nick
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Status NEW Posted 09 Nov 2017 11:11 AM My Price 11.00

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