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10 Nov 2019

Liquid acetaldehyde reacts according to the balanced equation.When 279.4 g of O2 is reacted, calculate thesign and magnitude (kJ) of the heat produced. Express youranswer to three significant figures.

2CH3CHO(l) + 5O2(g) ?4CO2(g) + 4H2O(l)

Enthalpy (kJ)

?H = -2335.0

Molar Mass (g/mol)

CH3CHO 44.05

O2 31.999

CO2 44.001

H2O 18.015

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6 Nov 2019

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