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QUESTION 17 Calculate the heat evolved by the reaction of 45.7 g of a substance burned...
A 0.44 mol sample of a substance is burned in a bomb calorimeter with a heat capacity of 8.87 kJ/C. The temperature increases by 8.36 C. What is ΔHrxn (in kJ/mol) for the combustion of the substance?
A 0.456 g (176.1 g/mol) sample of acid in question 11 is burned in a bomb calorimeter. Calculate the change in enthalpy if the temperature for 1350 g of water in the calorimeter changes from 21.5 oC to 30.4 oC. The heat capacity of the calorimeter is 564 kJ/oC.
When 1.034g of naphthalene (C10H8) is burned in a constant-volume bomb calorimeter at 298K, 41.56 kJ of heat is evolved. Calculate the change in U and w for the reaction on a molar basis.
3. Calculate the heat released and Ecombustion when 0.263 g of caffeine (C8H10O2N4) is burned in a bomb calorimeter. The calorimeter constant is 3.78 kJ/C. and the temperature rises 1.525 degrees Celsius.
1a) Consider the reaction: C12H22O11(s)+12O2(g)→12CO2(g)+11H2O(l) in which 10.0 g of sucrose, C12H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/∘C. The temperature increase inside the calorimeter was found to be 22.0 ∘C. What is the heat of this reaction per mole of sucrose? 1b) One tablespoon of peanut butter has a mass of 17.0 g. It is combusted in a calorimeter whose heat capacity is 110 kJ/°C. The temperature of the calorimeter rises from 21.6...
Suppose you burned 0.300 g of C(s) in an excess of O2 (G) in a constant-volume calorimeter to give CO2 (G). The temperature of the calorimeter, which contained 725 g of water, increased from 26.05 °C to 28.57 °C. The heat capacity of the bomb is 869 J/K. Calculate per mole of carbon. (The specific heat capacity of liquid water is 4.184 J/g ⋅ K.) = kJ/mol
When a 3.08 g sample of liquid octane (C8H18) is burned in a bomb calorimeter, the temperature of the calorimeter rises by 26.9 oC. The heat capacity of the calorimeter, measured in a separate experiment, is 6.22 kJ/∘C . The calorimeter also contains 3.00 kg of water, specific heat capacity of 4.18 J/g°C. Determine the heat of combustion of octane in units of kJ/mol octane.
A 0.0593−mol sample of a nutrient substance, with a formula weight of 114 g/mol, is burned in a bomb calorimeter containing 4.73 × 102 g H2O. Given that the fuel value is 4.80 ×10−1 in nutritional Cal when the temperature of the water is increased by 6.86°C, calculate the fuel value in kJ. Enter your answer in scientific notation. Be sure to answer all parts.
Heat Capacity and Calorimetry
A sample of ethanol, C2H5OH, weighing 2.84 g was burned in an
excess of oxygen in a bomb calorimeter. The temperature of the
calorimeter rose from 25C to 33.73C. If the heat capacity of the
calorimeter and contents is 9.63kJ/C, what is the value of q for
burning 1.00 lol of ethanol at constant volume and 25.00C.
Is q equal to U or H?
214e Questions and Problems the enthalpy change when 0.710 mol of calcium...
A quantity of 1.922 g of methanol (CH3OH) was burned in a constant-volume bomb calorimeter. Consequently, the temperature rose by 5.52°C. If the heat capacity of the bomb plus water was 8.75 kJ / °C, calculate the molar heat of combustion of methanol.