An engineer investigated the energy transferred to a copper block by burning different gas fuels using a specialized burner.
| Fuel | Initial mass of cylinder in g | Final mass of cylinder in g | Mass of fuel burned in g |
|---|---|---|---|
| Methane | 245.80 | 243.62 | 2.18 |
| Ethane | 278.15 | 276.03 | 2.12 |
| Propane | 312.40 | 310.45 | |
| Butane | 350.55 | 348.73 | 1.82 |
The results show that 2.12 g of ethane was needed to raise the temperature of the copper block by 35 ∘C35\text{ }^\circ\text{C}35 ∘C.
Calculate the mass of ethane needed to raise the temperature of the copper block by 1 ∘C1\text{ }^\circ\text{C}1 ∘C.
Give your answer to 3 decimal places.
Show your working.
94 exam-style questions on Edexcel GCSE Chemistry 8.2 Heat energy changes in chemical reactions, covering 8.2.1 Exothermic and endothermic changes, 8.2.2 Bond breaking, bond making and overall energy change, 8.2.3 Calculating energy change from bond energies, and 8.2.4 Activation energy and reaction profiles. Each one has a worked solution and a mark scheme showing where the marks go.