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A sample of solid 1,9-nonanediol (C9H20O2) that weighs 0.5724 g is burned in an excess of...

A sample of solid 1,9-nonanediol (C9H20O2) that weighs 0.5724 g is burned in an excess of oxygen to CO2(g) and H2O(l) in a constant-volume calorimeter at 25.00 °C. The temperature rise is observed to be 2.210 °C. The heat capacity of the calorimeter and its contents is known to be 9.268×10^3 J K^-1. (a) Write and balance the chemical equation for the combustion reaction. Use the lowest possible coefficients. Please specify states such as (aq) or (s).

____+____--->____+____

Based on this experiment: (b) Assuming that H° is approximately equal to E, calculate the standard enthalpy change for the combustion of 1.000 mol of 1,9-nonanediol to CO2(g) and H2O(l).

____ kJ mol-1

(c) Calculate the standard enthalpy of formation per mole of 1,9-nonanediol, using the following for the standard enthalpies of formation of CO2(g) and H2O(l).

Hf° H2O (l) = -285.83 kJ mol-1 ; Hf° CO2(g) = -393.51 kJ mol-1

____ kJ mol-1

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