In a coal-fired power plant, coal is burned to generate heat that boils water. 2.5 kg of coal is bur — Thermodynamics Chemistry Question
Question
In a coal-fired power plant, coal is burned to generate heat that boils water. 2.5 kg of coal is burned to heat 500.0 kg of water at 95 °C, ultimately converting 30.0 kg to steam. Which type of coal was burned? (For liquid water near 100 °C , Cp = 4.21 kJ kg–1 K–1 and ΔH°vap = 2260 kJ kg–1.)
A.
Lignite, ∆H°combustion = 15 – 20 kJ g–1
B.
Sub-bituminous, ∆H°combustion = 23 – 28 kJ g–1
C.
Bituminous, ∆H°combustion = 26 – 30 kJ g–1
D.✓ Correct
Anthracite, ∆H°combustion = 30 – 33 kJ g–1
💬
Still have doubts about this question?
Practice more questions like this, completely free.