The temperature of a block of iron increases by 2 k when 3760 j of heat are added to it. what is the mass of the block of iron? the specific heat capacity of iron is 470j/kg*k. 5 kg 4 kg 2 kg 3 kg

The amount of heat needed to increase the temperature of a substance by  is:

where
Q is the amount of heat
m is the mass of the substance
Cs is the specific heat capacity of the substance
is the variation of temperature

We know the heat added to the block of iron, Q=3760 J, its variation of temperature, , and the specific heat capacity of iron, , so we can re-arrange the previous formula to find the mass of the block: