Answer:
2835 J
Explanation:
Take the specific heat capacity of water as 4.2 J/ g°C.
Energy (heat) = mass x specific heat capacity x change in temperature
(E= mcΔT)
E = 27 x 4.2 x (45-20)
E = 2835 J
Cold coffee
The higher the temperature of something, the more kinetic energy it will have. The colder coffee's molecules will have less kinetic energy than the hot coffee's molecules
b
the third one
