Sapling Learning macmillan learning The figure below is a heat curve for an unkn

Question

Sapling Learning macmillan learning 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, fusion and vaporization, T for this unknown substance? vapor Note that the units are graded. Temperature (CC) 400 Number Units 380 360 340 80 320 fusion 300 280 260 240 220 Units Number 200 180 160 280 vapor 140 120 100 80 60 For a sample of 64.2 g of this substance 40 with a specific heat of 49.2 J/kg. OC, how 20 much heat is added to the substance if the 20 temperature is to change from 180.0°C to -40 232.0°C? -60 -80 120 40 80 Number Time 121.507 Incorrect Map 160

Explanation / Answer

Heat added Q = mCPT = mCP(T2-T1)

Given:

m =64.2 g = 0.0642 Kg

CP = 49.2 J/Kg.0C

T1= 180 0C   

T2 = 232 0C

Q = 0.0642 × 49.2 × (232-180)

Q = 164.249 J

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