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A sample of water vapour at 200 degrees C is compressed isothermally from 350 cm^3 to 120 cm^3. What is the change in its molar Gibbs energy?
Calcultate what is the value of enthalpy H reaction If the temperature increased from 35.0 degree celsius to 76 degree celsius and the heat capacity of the calorimeter = 23.3kj/c ? (the molar mass of C2H5OH = 46.07g/mol. )
Calculate ΔHo fusion and ΔSo fusion for the substance If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K. ?
a beaker containing 250g of water is heated from 23 degrees C to 100 degrees C. what is the heat gain in calories?
30.0 mL of 0.150 M CH3CO2H are titrated with 0.150 M NaOH. What is the pH of the solution after 15.0 mL of NaOH has been added. The Ka for acetic acid is 1.80 x 10-5
Write the overall cell reaction of each. Identify the anode and cathode of each. Arrange the three metals in order of decreasing ease of oxidation(most easily oxidized metal first
When power was turned off to a 30.0 gal. water heater, the temperature of the water dropped from 75.0°C to 22.5°C. How much heat was lost to the surroundings? (1 gal = 3.785 L) Assume the density of water is 1.00 g/mL.
Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion.
A soft drink contains 35 mg. of sodium in 315g. of H2O. What is the concentration of sodium in the soft drink in mass percent?
A flask contains 0.110 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
Assume that a reaction takes place at 296 K and 306 K. What must the activation energy be for the rate constant to double as described.
How many milliliters of O2 are consumed in the complete combustion of a sample of hexane, C6H14, if the reaction produces 789. mL of CO2? Assume all gas volumes are measured at the same temperature and pressure.
If you are given sodium acetate and asked to make a .5 M acetate buffer at pH 4.75, will you have to add acid, base, or nothing in order to achieve the proper pH? What is the approximate pH after adding the sodium acetate?
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