PHS The figure below is a heat curve for an unknown outer space substance discov
ID: 2272081 • Letter: P
Question
PHS
The figure below is a heat curve for an unknown outer space 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 69.0 g of this substance with a specific heat of 47.8 J/kg- degree C, how much heat is added to the substance if the temperature is to change from 180.0degreeC to 256.0degreeC?Explanation / Answer
T_fusion=80 C, T_vapour=280 C
Heat=m*c*dT=0.069*47.8*(256-180)=250.66 J
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