Flow rate = 5.0 L/min = 5.0 kg/min, ΔT=87−27=60°C
Heat required per minute: Q=mcΔT=5.0×4200×60=1.26×106 J/min
If m grams of gas consumed per minute:
m×5.0×104=1.26×106
m=5.0×1041.26×106=25.2 g/min
Rate =6025.2=0.42 g/s
A gas based geyser heats water flowing at the rate of 5.0 litres per minute from 27∘C to 87∘C. The rate of consumption of the gas is ____ g/s.
(Take heat of combustion of gas =5.0×104 J/g) specific heat capacity of water =4200 J/kg⋅∘C
Held on 21 Jan 2026 · Verified 6 Jul 2026.
0.42
2.1
0.21
4.2
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