Coal-fired steam engines get their power by using the heat from burning coal to boil water. Suppose that coal of density 1.5 g · cm^–3 is carbon (it is, in fact, much more complicated, but this is a reasonable first approximation). The combustion of carbon is described by the equation

(a) Calculate the heat produced when a lump of coal of size 7.0 cm* 6.0 cm * 5.0 cm is burned.

(b) Estimate the mass of water that can be heated from 25 °C to 100. °C by burning this piece of coal.

Transcribed Image Text:

C(s) + O₂(g) CO₂ (g) AH° = -394 kJ