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  3. part a) a 0.5865-g sample of lactic acid (hc3h5o3)

Part A) A 0.5865-g sample of lactic acid (HC3H5O3) is burned in a calorimeter whose heat...

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Chemistry

Part A) A 0.5865-g sample of lactic acid(HC3H5O3) is burned in a calorimeter whose heat capacity is 4.812kJ/°C. The temperature increases from 23.10 °C to 24.95 °C.Calculate the heat of combustion of lactic acid per mole.

Part B) Theenthalpy of reaction for the combustion of C toCO2 is –393.5kJ/mol C, and the

enthalpy for the combustion of CO to CO2 is –283.0kJ/mol.

Calculate the enthalpy for the combustion of C to CO:

Part C) Carbonoccurs in two forms, graphite and diamond. The enthalpy of thecombustion

of graphite is–393.5 kJ/mol and that of diamond is–395.4 kJ/mol

C (s, graphite) +O2(g) -->CO2 (g)  

C (s, diamond) +O2(g) -->CO2 (g)  

Calculate for the conversion of graphite to diamond:

∆H = ____ kJ

Answer & Explanation Solved by verified expert
4.4 Ratings (824 Votes)
Part A Q C delta T 4812 kJC 2495231C 89022 KJ molar mass of HC3H5O3 90 gmol number of molesn    See Answer
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