Enter your answer in the provided box. An iron bar of mass 719 g cools from...

Question

Question

Enter your answer in the provided box. An iron bar of mass 719 g cools from 92.0°C to 4.0°C. Calculate the metals heat chang

Answer 1

Answer #1

Q = mc∆T

Q = heat energy (Joules, J), m = mass of a substance (g)

c = specific heat (units J/g∙^oC), ∆ is a symbol meaning "the change in"

∆T = change in temperature (^oC Celcius) = 92 - 4 = 88 ⁰C

specific heat of iron = 0.450 J/g ^oC

Q = 719 g x 0.45 J/g ^oC x 88 ⁰C = 28472.4 Joules or 28.472 Kilojoules

Answer 2

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