Question

if a heater with power 1000w gives 4200000j of heat energy in one hour,what will be the temperature raised in the 20 kg of water with temperature 30° c by that heat​

Answer 1

Answer:

Temperature raised=50°C resulting in final temperature of 80°C

Explanation:

Specific heat of water is 4200J/kg meaning it takes 4200 J of energy to raise 1 kg of water by 1°C

Applying 4,200,000 J for 20 kgs, the resulting increase on temperature is 4,200,000/(20*4200) = 50°C

Please correct me if I'm wrong. Cheers !! :)