The figure below is a heat curve for an unknown outerspace substance discovered

Question

The figure below is a heat curve for an unknown outerspace substance discovered by the Mars rover. By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, and vaporization, for this unknown substance? Note that the units are graded. For a sample of 88.2 a of this substance with a specific heat of 59.0 J/kg- degree C, how much heat is added to the substance if the temperature is to change from 180.0 degree C to 250.0 degree C?

Explanation / Answer

Tfusion = 80 degree celius

Tvapor = 280 degree celsius

Q = 88.2 * 10^-3 * 59 * (250 - 180)

= 364.27 J

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