Calculate the heat change (Q) for a substance given the mass, specific heat capacity and temperature change. (Formula: Q = mcΔT)

A 150 g sample of aluminium is heated from 25°C to 75°C. The specific heat capacity of aluminium is 0.90 J/(g·°C). Calculate the heat change for this sample.

A metallurgist is comparing the thermal properties of three different metal samples during a cooling process. Calculate the heat released by the copper sample as it cools from \(85.0\,^{\circ}\text{C}\) to \(22.0\,^{\circ}\text{C}\). Show your working.

A 250 g sample of copper is heated from 20 °C to 85 °C. Given that the specific heat capacity of copper is 385 J/(kg·K), calculate the heat energy absorbed by the copper.

A student heats 250 g of water from 18 °C to 65 °C in a calorimeter. The specific heat capacity of water is 4.18 J g⁻¹ °C⁻¹. Calculate the heat change absorbed by the water, correct to 3 significant figures.