Question

**How much natural gas do you need to burn to heat 20 liters of water from 0 degrees C to 30 degrees C**

Step 1

Write the expression of density of water.

Step 2

Write the expression of heat transfer.

Step 3

The heat value of natural gas is 42 MJ/kg to 55 MJ/kg.

Hence, for 2.5 M...

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