Why does 1 kg of iron of `100^@C` melt much more ice than 1 kg of lead also at `100^@C`?

1 kg of iron at 100^(@)C melts more ice than 1 kg of lead at 100^(@)C . Explain why.

Density of mercury is 13.6 g*cm^(-3) " at " 0^(@)C. What will be the volume of 100 g of mercury at 100^(@)C ? Coefficient of real expansion of mercury 1/5550""^(@)C^(-1).

What is the amount of work done to convert 40 g of ice at -10^(@)C into steam at 100^(@)C ? Specific heat of ice = 0.5 cal cdot g^(-1) cdot ^(@)C^(-1) , latent heat of fusion of ice =80 cal cdot g^(-1) , latent heat of steam = 540 cal cdot g^(-1), J = 4.2 xx 10^(7) erg cdot cal^(-1) .

Calculate the entropy increase in the evaporation of 1 mole of a liquid when it boils at 100^@C having heat of vaporisation at 100^@C as 540 cals\gm.

The temperature coefficient of resistance of a metal is 0.004 ^@C^-1 . If a wire has resistance 1 Omega at 0^@C then what will be the value of that resistance at 100^@C ?