posted by Diana .
ALL ice melts at 0*C, but it requires MORE HEAT to melt 10g of ice than it would for 20g of ice.
Why? I thought it was the opposite.
that strange!! the amount of heat evolved for a particular substance is Q = mc?T where m is the mass of that substance c is the specific heat capacity and ?T is the change in temperature during transition change or reaction.
So as the mass increased so the Q as well.
maybe the factors reponsible are:
or the Einstein theory of universe contraction.......
Surface area changes the TIME it takes to melt but doesn't change the amount of heat required to melt.
I don't know where you got the idea that it requires more heat to melt 10 g than 20 g. And you are right, it IS the opposite. If it takes x amount of heat to melt 10 g it must take 2x to melt 20 grams or 3x to melt 30 g.