Two 10g blocks, one of copper and one of iron, were heated from 300 K to 400K (a temperature difference of 100 K).

1) 385 J

2) 450 J

Explanation:

1)

The amount of energy that must be absorbed by a certain substance in order to increase its temperature by is given by the equation:

where

m is the mass of the substance

C is its specific heat capacity

is the increase in temperature of the substance

For the block of copper in this problem, we have:

m = 10 g is the mass

is the specific heat capacity of copper

is the change in temperature

So, the energy absorbed by the block of copper is

2)

Similarly for the block of iron, the energy absorbed by the iron is given by

where

m is the mass of the block of iron

C is its specific heat capacity of iron

is the increase in temperature of the block

Here we have:

m = 10 g is the mass of the block

is the specific heat capacity of iron

is the change in temperature

So, the energy absorbed by the block of iron is