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Under constant volume conditions the heat of combustion of benzoic acid (C6H5COOH) is -26.38 kJ/g. A 1.640 g sample of benzoic acid is burned in a bomb calorimeter. The temperature of the calorimeter rises from 22.25 oC to 27.20 oC. A 2.500 g sample of glucose (C6H12O6) is then burned in the same calorimeter. The temperature of the calorimeter rises from 20.55 oC to 25.00 oC. What is the ?Hcombustion of glucose in kJ/mol?
H: 1.008 g/molC: 12.011 g/molO: 15.999 g/mol
Use the standard enthalpies of formation given below to calculate the enthalpy change for following reaction at 298.15 K and 1 atm. Label each as endothermic or exothermic.
the reaction of the Grignard reagent containing more carbon atoms with the carbonyl compound containing less carbon atoms andscheme two involves the reaction of the Grignard reagent containing less carbon atoms
An empty 2.0 L soda bottle is tightly capped at 22 degrees Celsius and 650 mmHg. If the bottle is placed in water at 95 degrees Celsius, what is the pressure in the bottle?
a student was asked to identify an unknown hydrate by following the procedure described in this module. after heating
a sample of nitrogen gas kept in a container of vulume 2.43 L and temp 27degree C exerts a pressure of 4.83 atm. calculate the number of moles of gas present
What are the advantages and disadvantages of natural products as lead compound?
Calculate the pH at 25°C of an aqueous solution that is 0.320 M in ethylamine and 0.140 M in ammonia (i.e. the solution contains both compounds). The pKa of the conjugate acid of ethylamine is 10.65 and the pKa of the conjugate acid of ammonia is ..
predict whether a reaction will occur in each of the following. if so write the balanced chemical equation as well as the net ionic equation. Phases are all required for all species.
The strength of a bottle of vinegar was determined by adding potassium carbonate to a 20 ml sample of vinegar until bubbling ceased. The amount potassium carbonate added at the point the bubbling ceased was 1.134 grams. What is the concentration o..
The speed of light in a vacuum is 2.998x10^8 m/s. what is the speed of kilometers per hour. what is the speed in miles per minutes.
A solution is prepared by adding 5.00 grams of an unkown compound to 217 g of cyclohexane (C6H12). This solution freezes at 4.5 degree C.
calculate the alkaline strength of a sample of impure k2co3 in terms of per cent k2o from the following data wt. of
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