Chapter 4 Properties of Matter

ex. 4.1 If 1638 J raise the temperature of 125 g
of the solid from 25.0 o C to 52.6 o C,
calculate the specific heat in J/g o C.
heat 1638 J
specific heat = ──── = ─────────
g × Δt (125 g)(52.6 – 25) o C
= 0.475 J/g o C
ex. 4.2 a metal with a mass of 212 g is heated
to 125.0 o C, and then dropped into 375 g
water at 24 o C. the final temperature of
water is 34.2 o C. specific heat of metal
heat gain by water = (375 g)(10.2 o C)(4.184J/g o C)
= 1.60 × 10 4 J
heat
1.60 × 10 4 J
specific heat = ──── = ─────────
of metal g × Δt (212 g)(125 – 34.2) o C
= 0.831 J/g o C
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