A student investigates the temperature rise of water in a stainless-steel beaker placed above a spirit burner containing a flammable liquid.
State whether each of the changes listed in the table would increase, decrease, or have no effect on the value of the maximum temperature of the water.
| Change | Effect on the value of the maximum temperature of the water |
|---|---|
| Wrapping the sides of the stainless-steel beaker with a layer of mineral wool insulation | |
| Using a digital temperature probe with a precision of 0.01∘C0.01^\circ\text{C}0.01∘C instead of a glass thermometer with 0.1∘C0.1^\circ\text{C}0.1∘C divisions | |
| Increasing the distance between the flame of the spirit burner and the bottom of the beaker |
In one experiment, butan-1-ol was used as the flammable liquid. The calculated heat energy change was 41440 J41440\text{ J}41440 J.
In this experiment, the mass of butan-1-ol burned was 1.48 g1.48\text{ g}1.48 g.
The relative molecular mass of butan-1-ol is 747474.
Use this information to calculate the molar enthalpy change of combustion, in kJ/mol\text{kJ/mol}kJ/mol, of butan-1-ol.
