A 128 G Sample of Ethanol (C₂H₅OH)is Burned in a Bomb

question 34

Multiple Choice

A 12.8 g sample of ethanol (C₂H₅OH) is burned in a bomb calorimeter with a heat capacity of 5.65 kJ ${ } ^ { \circ } \mathrm { C } ^ { - 1 }$ .Using the information below,determine the final temperature of the calorimeter if the initial temperature is 25.0°C.The molar mass of ethanol is 46.07 g $\mathrm { mol } ^ { - 1 }$ . C₂H₅OH(l) + 3O₂(g) ? 2CO₂(g) + 3H₂O(g) $D _ { \mathrm { r } }$ U = -1235 kJ $\mathrm { mol } ^ { - 1 }$

• A)53.4 °C
• B)28.1 °C
• C)111 °C
• D)85.7 °C
• E)74.2 °C

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