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Calculate ?rH° for the reaction 2C(s) + 3 H2(g) + ½ O2(g) ? C2H5OH(l) given the information below. C(s) + O2(g) ? CO2(g) ?rH° = -393.5 kJ/mol-rxn 2 H2(g) + O2(g) ? 2 H2O(l) ?rH° = -571.6 kJ/mol-rxn C2H5OH(l) + 3 O2(g) ? 2 CO2(g) + 3 H2O(l) ?rH° = -1367.5 kJ/mol-rxn
Multiple choice questions in organic chemistry - Which of the following statements are true about the processes of melting and freezing?
A solution of only A is made that is initially 0.800 M. After the solution is allowed to reach equilibrium, it is determined that the concentration of B is 1.20 x 10^-4 M. Use this information to determine the equilibrium constant for the reaction..
In trans-1,2-dibenzoylethylene, even though the conjugated C=O group frequency coincides directly with the expected C=C stretching fequency, we would not have expected to observe the late stretching mode in the infrared spectum. Why?
identify the following as characteristic of a solution, colloid, or suspension: a)particles of this mixture remain inside a semipermiable membrane, but pass through filters. b)the particles of solute in this mixture are very large and visible.
Calculate the standard enthalpy of formation of liquid water (H2O) using the following thermochemical information
Determine the molarity of Ni in the 20.0 mL solution. Determine the mass in grams of Ni in the original sample. Determine the weight percent of Ni in the sample.
Suppose that 1.41 g of impure barium hydroxide is dissolved in enough water to produce 177.1 mL of solution and that 44.1 mL of this solution is titrated to the stoichiometric point
Which of the following terms define(s) an acid according to the Bronsted-Lowry theory?
A 2.914-g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 Celsius in a crucible until a constant mass is reached.
An automobile has a wavelength that is not measurable by human standards. If the car has a mass of 4000 lbs (1.81 x 103 kg) and travels at 60 miles/hr (26.8 m/s), calculate the wavelength of the car.
What are the equilibrium partial pressures? Nitrogen dioxide decomposes according to the reaction given below where Kp = 4.48 x10^-13
the consentration of the reactant to drop to 25% of its inital value. what is the rate constant for reaction?
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