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A 20.0 g piece of a metal with specific heat of 0.900 J/g.0C at 98.0 0C dropped into 50.0 g water in a calorimeter at 20.0 0C. The specific heat of water is 4.18 J/g.0C Calculate the final equilibrium temperature of the mixture
Question 5
A gas heated and it absorbs 100 kJ of heat. It expand doing 25 kJ of work. What is the internal energy change of the gas?
Question 6
Calculate the standard enthalpy of formation of propane, C3H8(g), given that ΔH°f[CO2(g)] = –394 kJ/mol and
ΔH°f[H2O(l)] = –242 kJ/mol, and the following thermochemical equation
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) ΔH° = is –2044 kJ
Question 7
Given that the molecular formula of sand is SiO2 and that its specific heat is 0.84 J/g°C, its molar heat capacity is
Question 8
Calculate the standard enthalpy change for the following reaction given that the ΔHf° of benzene, C6H6(l) is 49 kJ/mol, the ΔH°f of CO2(g) = –394 kJ/mol and ΔH°f of H2O(g) = –242 kJ/mol:
2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O(g) ΔH° = ?
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