Question

banana with an average mass of 0.15 kg and average specific heat of 3.35 kJ/kg · °C is cooled from 20°C to 5°C. The amount of heat transferred from the banana is

a.
62.1 kJ

b.
7.5 kJ

c.
None of these

d.
6.5 kJ

e.
0.85 kJ

f.
17.7 kJ

Answer 1

Answer:

The amount of heat transferred from the banana is (-)7.54 KJ

Explanation:

As we know,

$Q = m*c*\Delta T$

Q = Amount of heat transferred

m = mass of banana

$T_2 = 5$ degree Celsius

$T_1 = 20$ degree Celsius

The amount of heat transferred from the banana =

$0.15 * 3.35 * (5 -20)\\-7.54$KJ (negative sign represents reduction in heat energy)