A sample of an unknown substance has a mass of 89.5 g. If 345.2 J of heat are required to heat the substance from 285 K to 305 K, what is the specific heat of the substance?

Question

Chemistry

Anabel Alvarez

9 April, 07:14

A sample of an unknown substance has a mass of 89.5 g. If 345.2 J of heat are required to heat the substance from 285 K to 305 K, what is the specific heat of the substance?

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Chaya Vincent · Answer 1

The specific heat is the heat needed per unit mass to raise the temperature by 1 degree celsius. So the specific heat = heat / (mass*ΔT) = 345.2/[89.5 * (305-285) ]=0.193 J / (g*℃). When using ΔT, the unit K and ℃ are the same.