Enthalpy Change And Compounds Lab Report
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The compound nonane, C9H20, is a good fuel. It is a liquid at ordinary temperatures. When the liquid is burned, the reaction involved is
9 CO2(g) + 10 H2O(g)The standard enthalpy of formation of liquid nonane at 25 °C is -274.7 kJ mol-1; other relevant enthalpy of formation values in kJ mol-1 are:
C9H20(g) = -228.2 ; CO2(g) = -393.5 ; H2O(g) = -241.8
(a) Calculate the enthalpy change in the burning of 3.000 mol liquid nonane to form gaseous products at 25°C. State explicitly whether the reaction is endothermic or exothermic.
(b) Would more or less heat be evolved if gaseous nonane were burned under the same conditions?
What is the standard enthalpy change for vaporizing 3.000 mol C9H20(
) at 25°C?
Calculate the enthalpy change in the burning of 3.000 mol gaseous nonane to form gaseous products at 25°C.
ΔH° =
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