An outdoor pursuits instructor is testing the efficiency of different camping stove fuels. They used a portable burner to heat 450 cm3 of water by 40∘C40^\circ\text{C}40∘C for each liquid alkane fuel.
Table 1 shows some of their measurements.
Table 1
| Alkane fuel | Initial mass of burner and fuel (g) | Final mass of burner and fuel (g) | Mass of alkane burned (g) |
|---|---|---|---|
| Propane | 345.85 | 344.20 | 1.65 |
| Butane | 350.12 | 348.67 | |
| Pentane | 362.40 | 361.05 | 1.35 |
| Hexane | 374.95 | 373.83 | 1.12 |
Calculate the mass of butane burned.
