• Heat Capacity (C)

   

n            Energy transferred to ↑ 1℃ of the obj.

u          Heat capacity = mass x specific heat capacity

u          C = mc

u          Unit: J ℃^-1

• Specific heat capacity (c)

   

n            Energy transferred to ↑ 1℃ of 1 kg obj.

u          Energy transferred = mass x specific heat capacity x change in temp.

u          E = mc△T

u          Unit: J kg^ -1 ℃^-1

• Mixture ( Long Q 出, 書P.28, Example 7)

   

n            Energy lost by hot body = energy gained by cold body

n            會問main errors

l            Heat loss to surroundings

l            Some energy is used to heat up polystyrene cup, stirrer & thermometer

n            led to experimental value ＞ actual value

n            之後會問點樣 improve accuracy of experiment

→ Wrap the polystyrene cup with cotton wool

→ 有可能MC/ LONG Q出, 看書就可