? 發問時間: 社會與文化語言 · 1 0 年前

Find the heat capacity

The Temperature of 500kg of a certain metal is raised to 100 degrees

C,and then placed in 200g (convert) of water at 15 degrees C. If the

final steady temperature rises to 21 degrees C, calculate the specific

heat capacity of the metal (take water as 4200 joules)

Actually, I doubt the queation.

Please help me

>3<

1 個解答

評分
  • 小頹
    Lv 4
    1 0 年前
    最佳解答

    Formula: Q = m(△T)Cp

    metal - m= 500kg, △T=100。C - 21。C=79。C

    water - m=200g, △T=21。C - 15。C=6。C, Cp=4200J/g。C

    to find Cp of metal:

    Qm = 500000g *100。C * Cpm

    Qw = 200g * 6。C * 4200J/g。C

    Qm = Qw

    ∴, 500000g *100。C * Cpm = 200g * 6。C * 4200J/g。C

    → Cpm = 0.12759 J/g。C← 

    2008-04-11 08:24:57 補充:

    Correct Error Above:

    Qm = 500000g *100。C * Cpm

    should be

    Qm = 500000g *79。C * Cpm

    ∴ 500000g *79。C * Cpm = 200g * 6。C * 4200J/g。C

    The answer stay the same,

    2008-04-11 08:25:19 補充:

    Cpm = 0.12759 J/g。C

    參考資料:
還有問題?馬上發問,尋求解答。