Physics gr. 7 – Black Principle’s Package B
1) A hot iron with a mass of 1 kg and a temperature of 100 oC is put into a container
containing 2 kg of water and a temperature of 20 oC. What is the temperature
of the final mixture? The specific heat of iron = 450 J/kg oC, the specific heat of
water = 4200 J/kg oC.
2) 0.2 kg mass of ice mixed with warm tea with a mass of 0.2 kg. Temperature of
ice = -10 oC, temperature of warm tea = 40 oC. The specific heat of ice = 2100
J/kg oC, the specific heat of water = 4200 J/kg oC, the heat of fusion for water
= 334000 J/kg. Ice and tea are mixed in an isolated closed system. What will
be the final temperature?
BIMBEL EDUTOPIA | Physics gr. 7 – Black Principle’s Package B | 1