Question

A geyser, operating on LPG (liquefied petroleum gas) heats water flowing at the rate of 3.0 litres per minute, from 27oC to 77oC. If the heat of combustion of LPG is , how much fuel in grams is consumed per minute?

Solution

Correct option is

15.75

 

Volume of water flowing per minute = 3.0 litres min – 1

                                 = 3000 cm3 min – 1

Density of water = 1 g cm – 3

 

Rise in  temperature = 77 – 27 = 50oC

Specific heat of water = 4200 J 

 

                                   

Now, heat of combustion of LPG 

 

                                                               

                                                                

SIMILAR QUESTIONS

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Q7

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Q8

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Q10

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