Calculate the Amount (Mass)of Acetic Acid (C₂H₄O₂, Molar Mass = $\Delta$

question 121

Multiple Choice

Calculate the amount (mass) of acetic acid (C₂H₄O₂, molar mass = 60.052 g mol^-1) that causes a bomb calorimeter with a heat capacity of 8.43 kJ °C^-1 to have a temperature increase from 24.5 °C to 36.8 °C. The $\Delta$ _rU for the combustion of acetic acid is -874.2 kJ mol^-1.

• A)6.18 g
• B)7.12 g
• C)2.18 g
• D)9.66 g
• E)8.68 g

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