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1. You have a 134.0g sample of water at -30 oC and you heat it until you have gaseous water at 140 oC. Calculate the energy required for this process.
2. N2 and O2 make up the majority of the Earth's atmosphere with partial pressures of 0.78 and 0.21 atm, respectively. These two gases are extremely stable at normal atmospheric temperatures. Inside of a lightning bolt, however, temperatures are hot enough that these two species react to form NO. You can use the following assumptions: the temperature is 2200 oC inside the lightning bolt, the bolt lasts long enough for all three species to reach equilibrium at that temperature, and the pressure of NO is 0.001 atm at equilibrium. Calculate the standard free energy change ΔGo for these conditions. (Note- this calculation will have some error in it because the gases are not in their standard states but we are calculating standard free energy. The point here is to see how different chemistry topics interact with each other (e.g. equilibrium and free energy). It is also a chance for you to practice using the equations and learn how to solve more challenging problems)
The pK value of the system is 6.1. If the [CO2] is expressed in terms of partial pressure and equals 1.3kPa and the bicarbonate concentration is 2.2 x 10^-3 M, what is the pH of the solution.
The enthalpy of formation of ethanol, C2H5OH, is -277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O
The U.S. Food and Drug Administration lists dichloromethane (CH2Cl2) and carbon tetrachloride (CCl4) among the many chlorinated organic compounds that are carcinogenic (cancer-causing).
What volume of 0.240 M K2S solution is required to completely react with 195 mL of 0.155 M Co(NO3)2.
If equal volumes of BaCl2(aq) and NaF(aq) solutions are mixed together, which will NOT give a precipitate (Ksp of BaF2 = 1.7 x 10-7)?
we will provide a standard solution of 0.100 m nacl and a solution of 20-fold diluted tonic water the unknown for your
The vapor pressure of ethanol at 34.7 degrees Celsius is 100mmgh, and the heat of vaporization of ehanol is 38.6 kj/ mol. What is the vapor pressure of ethanol in mm Hg at 65.0 degree celcius
Give five very important precautions to be taken into consideration while preparing an alcohol using Grignard reaction, explain each one
Calculate the weight percent composition of the mixture (hexane, heptanes, hexanol, and toluene). b. Calculate the mole percent composition of the mixture.
100.0 ml of .100 M acetic Acid is placed in a flask and is titrated with .100 M sodium hydroxide. An Appropriate indicator is used. Ka for acetic acid is 1.7x10^-5. Calculate the pH in the flask at the following points of titration.
The density of carbon in the form of diamonds is 3.51 g/cm^3. If you have a 40-carat spherical diamond, what is the diameter of the diamond in millimeters?
the reaction of potassium in water is extremely exothermic, what would be the problem with adding a large piece of potassium to a small amount of water?
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