A 2kg block is taken from a furnace where its temperature was 650C and placed on a large block of ice at 0C .Assuming that all the heat given up by the iron is used to melt the ice,how much ice is melted.

Question

jamesj · Answer

Still here?

(Heat released by 2kg block of iron as it goes from 650 C to 0 C)
=
(Heat used by water x kg water to go from solid to liquid)

Now figure out how to write down both sides of that equation.

shayaan_mustafa · Answer

Hello Sonia.
I am being an electronic engineering.
About 1 year I didn't touch heat chapter or you can say classical mechanics.
If you move some steps forward then I can help you in this. Is this specific heat question?

jamesj · Answer

Yes, clearly it is.  Let $ c_{iron} $ be the specific heat of iron in units of 
Joules/(gram.Kelvin).  The the amount of heat energy of 2 kg, $ m_{iron} = 2000 g $ moving from temperature T = 650 C to 0 C, $ \Delta T = 650 K $ is
$$ \Delta T . c . m_{iron} $$

Now find the formula for the heat required to melt x grams of ice and set it equal to this one.

shayaan_mustafa · Answer

Correct.

jamesj · Answer

yes, I know, many thanks.