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18. -12 points GilChem5 5.P.122. My Notes The specific heat of solid copper is 0.385 J/(g·°C). what thermal energy change occurs when the temperature of a 34.2 g sample of copper is cooled from 50.1°C to 12.1°C? Be sure to give your answer the proper sign. This amount of heat is used to melt solid ice at 0.0°C. The molar heat of fusion of ice is 6.01 k)/mol. How many moles of ice are melted? mol 19. 1/3 pointsI Previous Answers My Notes Methanol decomposes according to the following reaction: 90.2 k] + CH3OH(g) â CO(g) + 2 H2(g) (a) Is this reaction endothermic or exothermic? endothermic (b) what is the value of ÎHrxn for this reaction? (indicate the sign of the value as well.) kJ (c) How much heat would be absorbed or released if 51.2 g of methanol were decomposed in this reaction? kJ Submit Answer Practice Another Version
18. -12 points GilChem5 5.P.122. My Notes The specific heat of solid copper is 0.385 J/(g·°C). what thermal energy change occurs when the temperature of a 34.2 g sample of copper is cooled from 50.1°C to 12.1°C? Be sure to give your answer the proper sign. This amount of heat is used to melt solid ice at 0.0°C. The molar heat of fusion of ice is 6.01 k)/mol. How many moles of ice are melted? mol 19. 1/3 pointsI Previous Answers My Notes Methanol decomposes according to the following reaction: 90.2 k] + CH3OH(g) â CO(g) + 2 H2(g) (a) Is this reaction endothermic or exothermic? endothermic (b) what is the value of ÎHrxn for this reaction? (indicate the sign of the value as well.) kJ (c) How much heat would be absorbed or released if 51.2 g of methanol were decomposed in this reaction? kJ Submit Answer Practice Another Version
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25 Jan 2019
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