CHEM 1040 Lecture Notes - Lecture 5: Calorimeter, Joule, Acetaldehyde
11 Oct 2018
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Version 1 - red scoring sheet: when 4. 00 g of acetaldehyde (ch3cho (l)) is burned, it produces 106. 1 kj of heat. The molar enthalpy of combustion of liquid acetaldehyde is: Answer is d. molar mass (ch3cho) = 2 x 12 + 4 * 1 + 16 44 g/mol. !1167: a bomb calorimeter is loaded with 3. 00 g of an unknown sample and pressurized with o2(g) to a pressure of 10. 00 atm. The final assembly has a total mass of 750. 00 g. combustion is initiated leading to the complete combustion of the sample. What is the final mass: less than 747 g, exactly 747. 00 g, exactly 750. 00 g, more than 750 g, impossible to predict without knowing the nature of the sample. Answer is c. the bomb calorimeter is completely sealed. Once all of the reactants are inside, the reaction converts reactants to products but no material escapes.
