Multiple Choice
A 35.6 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter according to the following reaction. If the temperature rose from 35.0 °C to 76.0°C and the heat capacity of the calorimeter is 23.3 kJ °C-1, what is the value of ΔrU°? The molar mass of ethanol is 46.07 g mol-1. C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(g) ΔrU° = ?
A) -1.24 × 103 kJ mol-1
B) +1.24 × 103 kJ mol-1
C) -8.09 × 103 kJ mol-1
D) -9.55 × 103 kJ mol-1
E) +9.55 × 103 kJ mol-1
Correct Answer:
Verified
Correct Answer:
Verified
Q9: Which of the following processes is endothermic?<br>A)
Q81: Identify the major greenhouse gas.<br>A) CO<sub>2</sub><br>B) O<sub>2</sub><br>C)
Q83: Astatine is an extremely rare element with
Q85: The specific heat of copper is 0.385
Q87: The specific heat capacity of methane gas
Q90: According to the following thermochemical equation, what
Q92: Match the following.<br><br>--w<br>A)the system loses thermal energy
Q93: Two solutions, initially at 24.69 °C, are
Q135: Which of the following statements is TRUE?<br>A)
Q150: Calculate the initial temperature of 648 g