Question

1. how much heat will be needed to raise the temperature of 1.5 kg of water from 15degree Celsius to 45 degree Celsius? give the answer in the calories as well as a joule ?

Answer 1

hey mates here is your answer....


Given = mass of water = 1.5 kg = 1500gm.
change in temperature = 45°C - 15°C = 30°C
heat required for a temperature change = ? heat required for temperature change = mass of water (gm) change in temperature (°C) cal.

= 1500×30cal = 45000cal
= 45000×4.18 J = 188100 J.




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Answer 2

a FOrmula is there

Q=M*C*©T

Q=Amount of heat required

M=mass of water given=1.5kg=1500g

C=sPecific heat of water=4.186J/g'c

©T=CHANGE IN TEMPERATURE=45-15=30'c

Q=1500*4.186*30

=188370j

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