How many kilojoules would it take to heat 140 litres of water from 40 degrees Celsius to 80 degrees Celsius
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Answer:
specific of water=4.2 j/g
density= 1000kg/ m^3
mass of water = 1000X0.14
140kg
heat required=140X4200 x(80-40)
140 x4200x40=23520000
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