The enthalpy of combustion of benzoic acid is -26.4 kJ/g. What is the enthalpy of combustion expressed in joules per kilogram? -2.64 x 103 J/kg O-2.64 x 101 J/kg O-2.64 x 107 J/kg O-2.64 x 1010 J/kg O-2.64 x 104 J/kg

Please don't handwrite  solution.   5) What quantity of heat (in kJ) will be absorbed by a 31.5 g piece of aluminum (specific heat = 0.930 J/g･ °C) as it changes temperature from 23.0 °C to 67.0 °C? 7) When 1.831 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperature of the calorimeter increases from 22.410 °C to 26.630 °C. If the heat capacity of the calorimeter is 4.900 kJ/ °C, what is the heat of combustion of sucrose, in kJ/mol?

The combustion of 0.1564 g benzoic acid increases the temperature of a bomb calorimeter by 2.53°C. Calculate the heat capacity of this calorimeter. (The energy released by the combustion of benzoic acid is 26.42 kJ/g.) Heat capacity = __________ kJ/°C A 0.2137-g sample of vanillin (C8H8O3)  is then burned in the same calorimeter, and the temperature increases by 3.22°C. What is the energy of combustion per gram of vanillin? Energy =__________  kJ/g Per mole of vanillin? Energy = ___________ kJ/mol

Ethanol, C2H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is a renewable resource and ethanol-blended fuels, like gasohol, appear to burn more efficiently in combustion engines. The heat of combustion of ethanol is 326.7 kcal/mol.The heat of combustion of 2-methylhexane, C7H16, is 1.150×103 kcal/mol. How much energy is released during the complete combustion of 446 grams of 2-methylhexane ?________ kcal Assuming the same efficiency, would 446 grams of ethanol provide more, less, or the same amount of energy as 446 grams of 2-methylhexane? _________. (more, less, or the same amount)

The combustion of propane (C3H8) produces 2220 kJ of energy per mole of propane consumed. What mass in grams of propane will be required to heat 55.0 gal of bathtub water from 25.0°C to 35.0°C if the process is 80.0% efficient? (1 gal = 3.785 L, 1 cal = 4.184 J, the density of water is 1.00 g/mL, the specific heat of water is 1.00 cal/(g°C)

Use the following equations to calculate the heat of the reaction for the formation of methanol. CH3OH(l) + 3/2 O2(g) → CO2(g) + 2H2O(l)   ∆ Ho = -727 kJ C(gr) + O2(g) → CO2(g)   ∆ Ho = -394 kJ H2(g) + 1/2 O2(g) → H2O(l)   ∆ Ho = -286 kJ Calculate ∆Ho for the following reaction:C(gr) + 2H2(g) + 1/2 O2 → CH3OH(l) methanolUse kJ for your answer.

If 0.067 mol of hydrochloric acid  (HCl)  is mixed with 0.067 mol of sodium hydroxide  (NaOH)  in a "coffee cup" calorimeter, the temperature of  5.1 g  of the resulting solution increases from 25.0 ° C to  34.0 ° C.   Given that  the energy released is    2.2  ×  101  cal when the specific heat of the resulting solution is  1.00 cal/g− ° C,  use a conversion factor to convert the energy released to joules (J). Enter your answer in scientific notation. Be sure to answer all parts.

Using the following equation for the combustion of postane, calculate the heat associated with the formation of 100.0 g of phosphorous dioxide.  The molar mass of postane is 263.6 g/mole.  The molar mass of phosphorous dioxide is 62.9 g/mole.               2 P8H18 + 25 O2  →  16 PO2 + 18 H2O    ΔH°rxn = -12018 kJ

Calculate the standard enthalpy for the reaction: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g), given the following data: N2(g) + O2(g) → 2NO(g) ΔHrxn = -43.1 kcal mol-1   N2(g) + 3H2(g) → 2NH3(g) ΔHrxn = -21.9 kcal mol-1   2H2(g) + O2(g) → 2H2O(g) ΔHrxn = -115.6 kcal mol-1   Round your answer to 2 decimal places.

5) 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. What is the heat for the combustion of naphthalene in kJ/mol? The heat capacity if the bomb calorimeter was determined to be 5.11 kJ/°C.