8. Thermochemistry

Which of the following statements correctly describes a key difference between a simple constant-volume calorimeter (such as a coffee-cup calorimeter) and a bomb calorimeter?

Which statement about bomb calorimetry is true?

Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 °C to 32.33 °C. If the heat capacity of the calorimeter is 5.11 kJ/°C, what is ΔErxn for the combustion of naphthalene in kJ/mol?

In a bomb calorimetry experiment, where does most of the heat generated by the reaction ultimately end up?

The combustion of toluene has a ΔErxn of -3.91×10^3 kJ/mol. When 1.55 g of toluene (C7H8) undergoes combustion in a bomb calorimeter, the temperature rises from 23.12 °C to 37.57 °C. Find the heat capacity of the bomb calorimeter.

A 21.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter, causing the temperature to rise from 25.0°C to 62.3°C. Given that the molar mass of ethanol is 46.07 g/mol, what is the heat capacity of the calorimeter?

In a constant-volume calorimetry experiment using a bomb calorimeter, what thermodynamic quantity is directly measured?

When 1.550 g of liquid hexane (C₆H₁₄) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87 °C to 38.13 °C. Find ΔErxn for the reaction in kJ/mol hexane. The heat capacity of the bomb calorimeter is 11.3 kJ/°C. What is the ΔErxn?

Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene burns in a bomb calorimeter, the temperature rises from 24.25°C to 32.33°C. If the heat capacity of the bomb calorimeter is 5.11 kJ/°C, what is ΔE_rxn for the combustion of naphthalene?

The temperature rises from 25.00 °C to 29.00 °C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion. Calculate ΔErxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/°C. What is the value of ΔErxn?

Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25°C to 32.33°C. Find ΔErxn for the combustion of naphthalene given that the heat capacity of the calorimeter is 5.11 kJ/°C.

When the combustion of 2.87 g of toluene is performed in a bomb calorimeter, the temperature rises from 20.05 °C to 44.15 °C. Given that the combustion of toluene, C7H8, has a ΔErxn of −3.50 x 10^3 kJ/mol C7H8, what is the heat capacity of the bomb calorimeter in kJ/°C?

A 2.49 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25 kJ/°C. If the temperature rose from 29.5 °C to 69.8 °C, determine the value of ΔH°comb for aniline.