A chemist carefully measures the amount of heat needed to raise the temperature

Question

A chemist carefully measures the amount of heat needed to raise the temperature of a 479.0mg sample of C9H10O2 from 47.2°C to 58.2°C. The experiment shows that 9.02 J of heat are needed. What can the chemist report for the molar heat capacity of C9H10O2? Round your answer to 3 significant figures.

A chemist carefully m easures the amount of heat needed to raise the temperature of a 479.0 mg sample of C9H10O2 from 47.2 to 58.2 °C. The experiment shows that 9.02 J of heat are needed. What can the chemist report for the molar heat capacity of CoH1002 Round your answer to 3 significant digits. 9110 2 x10 mol .K

Explanation / Answer

Heat required, q= mcdT, q= 9.02J

m= mass of the sample= 479mg=0.479g

c= specific heat of sample

dT= difference in temperature= T2-T1 = 58.2- 47.2 = 11oC

substituting the value in the equation (1)

9.02J = 0.479g * c * 11 oC

c= 1.712 J/goC

= 1.71 J/goC (upto 3 significant figures)

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