What amount of heat is required to raise the temperature of 85.9 g of water by 7°C? The specific heat of water is 4.184 J/gºC.

2516 J.

Explanation:

The amount of heat required to raise the T of water (Q) can be calculated from the relation:

Q = m. c.ΔT.

where, Q is the amount of heat required to raise the T of water,

m is the mass of water (m = 85.9 g),

c is the specific heat of ethanol in the gas phase (c = 4.184 J/g °C),

ΔT is the temperature difference (final T - initial T) (ΔT = 7.0 °C).

∴ Q = m. c.ΔT = (85.9 g) (4.184 J/g °C) (7.0 °C) = 2516 J.