Question

Calculate the kilojoules needed to heat 231 g of gold from 18 ∘C to 195 ∘C.

Answer 1

5.27 kJ of heat are required to heat 231 g of gold from 18 °C to 195 °C.

We have 231 g of gold at 18 °C and supply it with heat to increase its temperature to 195 °C. We can calculate the amount of heat required using the following expression.

$Q = c \times m \times \Delta T$

where,

• Q: heat

• c: specific heat capacity of gold (0.129 J/g.°C)

• m: mass

• ΔT: change in the temperature

$Q = \frac{0.129 J}{g.\° C} \times 231 g \times (195 \° C - 18 \° C) = 5.27 \times 10^{3} J = 5.27 kJ$

5.27 kJ of heat are required to heat 231 g of gold from 18 °C to 195 °C.

You can learn more about heating here: brainly.com/question/1105305