- #1
Karol
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- 22
Homework Statement
200 liters of water are heated from 100 to 650C by burning coal gas. The heat loss in the chimney is 25%.
How many cubic meters of gas are needed
Homework Equations
Calories required: [itex]Q=mc\delta t[/itex]
Burning heat of coal gas: 4320[Cal/m3]
The Attempt at a Solution
Net heat needed: [itex]Q=200\cdot 55=11,000[/itex]
Gross heat needed: [itex]Q\cdot 0.75=11,000\rightarrow Q=14,667[/itex]
Gas needed: [itex]4320\cdot x=14,667\rightarrow x=3.4[m^3][/itex]
It should be 2.9