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Ethanol, C2H5OH, boils at 78.29 degrees celsius. How much energy, in joules, is required to raise the temperature of 1.00 kg of ethanol from 20.0 deg C to the boiling point and then to change the liquid to vapor at that temperature? (the specific heat capacity of liquid ethanol is 2.44 J/g x K, and its enthalpy of vaporization is 855 J/g.)
For the molecular fragments given below indicate the multiplicity and relative intensities of the peaks that would be produced by the bold-faced hydrogen atoms in a 1H nmr spectrum
700 molecules of c14 labeled glucose are given to yeast cells that are producing alcohol. how many 14c atp molecules
A 1-ft-diameter cylinder is closed on one end and fitted with a moveable piston on the other. With 1 atm applied pressure, the piston is located 20 ft from the closed end
A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 125 for 1.0 of the gas to effuse. Under identical experimental conditions it required 28 for 1.0 of gas to effuse. Calcul..
How many litres of NO are produced at STP when 162 g Ag reacts with excess HNO3
estimate the enthalpy of vaporization of water 100 degree celcius from its value at 25 degree celcius (+44.01 kJ mol^-1) given the constant pressure heat capacities of 75.29 kJ^-1mol-1 and 33.55 kJ-1mol-1 for liquid and gas, respectively.
Suppose you have made 1L worth of a mixture of methanol and water, by mixing 3 parts of methanol and 2 parts of water by mass. Assume for simplicity that the volume of the mixture is exactly equal to the sum of the volumes of the ingredients
The water bath conatins 2.90 kg of water at 27.6 degrees celcuis. During the reaction 110 kj of heat flows out of the flask into the bath. Calculate the new temperature of the water bath
A certain reaction releases 10.1 kJ at constant volume and at constant pressure releases 8.4 kJ. What is the (delta)U for the reaction?
A first order chemical reaction has a rate constant of 5.8×104 s-1 at 10 °C and a rate constant of 4.7×105 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction.
If the barometeric pressure was 0.98 atm when the mercury level in an open-end manometer connected to a flask of gas was 177 mmHg higher on the side open to the atmosphere than on the flask side
Need to make an aqueous solution of 0.233 M potassium iodide for an experiment in lab, using a 250 mL volumetric flask. How much solid potassium iodide should you add?
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