how much heat energy is needed to raise the temperature of 78.4g of aluminum from 19.4 degrees c to 98.6 degrees c.

The heat that is needed to raise the temperature of 78.4 g of aluminium from 19.4 °c to 98.6°c is 5600.77 j

calculation

Heat (Q) = mass (M) x specific heat capacity (C) x change in temperature (ΔT)

where;

Q=?

M = 78. 4 g

C=0.902 j/g/c

ΔT=98.6°c - 19.4°c = 79.2°c

Q is therefore = 78.4 g x 0.902 j/g/c x 79.2°c = 5600.77 j