Question

How much heat is given out when an iron ball of mass 2kg and specific heat capacity 440J/kg°c,
cools from 300°C to 200°C.

Answer 1

Answer:

88000 joules

Explanation:

the the specific heat capacity tells us that 1 kg of a substance requires how much heat to raise its temperature by 1 degree Celsius.the specific heat capacity of iron is 440 joules per kg degree Celsius. This means that to raise the temperature of 1 kg by 1 degree Celsius we need 440 joules. show today's the temperature of 2 kg by 1 degree Celsius we need 440 into 2 joules which is 880 joules. in the above

example the temperature is raised from 200 degree Celsius to 300 degree Celsius so we have to raise the temperature of the iron by hundred degree Celsius.so we already know that to raise the temperature of 2 kg of iron by 1 degree Celsius we need 880 joules therefore to raise the temperature of 2 kg iron by hundred degree Celsius we need 880 into 100 joules which gives us 88000 joules or 88 kilo joules