Calculate the Amount (Mass)of Acetaldehyde (C₂H₄O, Molar Mass = 44 $\Delta$

question 10

Multiple Choice

Calculate the amount (mass) of acetaldehyde (C₂H₄O, molar mass = 44.0526 g mol^-1) that causes a bomb calorimeter with a heat capacity of 12.91 kJ °C^-1 to have a temperature increase from 27.8 °C to 41.7 °C. The $\Delta$ _rU for the combustion of acetaldehyde is -1166.9 kJ mol^-1.

• A)6.77 g
• B)8.67 g
• C)4.29 g
• D)7.30 g
• E)5.55 g

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