Question

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QUESTION 23 How much heat is released by the complete oxidation of 7.50 g of CH3OH according to the following balanced thermochemical equation? 2CH3OH + 302 --> 2002 + 2H20 AH rxn = - 1528 kJ/mol rxn O 84.9 kJ O 39.2 kJ O 317 kJ o 4.23 kJ 0 179 kJ O 275 kJ O 57.6 kJ 0 841 kJ

Answer 1

Question 23 balanced thermochemical equahon. 2 CH3OH + 302 2002 + 2H₂O Hyxne - 1528 kJ/molexn! molar may of CH3OH = 3204 gimol - (negative sign for release of heat) complete oxidation of a mole of CH3OH , released heat = 1528 kJ complete oscidation of2x32.04 9 of CH301 relecue beat : 1528 KJ >> complete oxidation of 7,50 9 of CHIOH, relece heat = 1528 kJ X 7.509 2x 32.049 = 179 kJ Hence, 179 KT heat is released by complete oxidation of 1.5og CH3OH