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A particular reaction has a ?Ho value of -155 kJ and ?So of -282 J/mol K at 298 K. Assuming that ?Ho and ?So hardly change with temperature, determine the temperature in K at which the spontaneity of this reaction changes.
The radius of the Earth is approximately 6370 km. if one could dig down straight towards the center of the Earth, one would find that the innermost 3480 km (the core) has an average density of about 11.g/cm^3.
Calculate the standard enthalpy of the reaction, \Delta {{H}^\circ}_{\rm rxn}, for the thermite reaction: \rm 2Al(s) + Fe_2O_3(s) \rightarrow 2Fe(s) + Al_2O_3(s)
Using the "unit conversion method", derive an equation to calculate the heat produced from the HCl-NaOH reaction, and write your equation on Sample Calculations A
consider the following reaction So2Cl2 + Cl2. A reaction mixture is being made containing an initial So2Cl2 of 2.3 x 10 -2. At equilibrium Cl2 = 1.0 x 10 -2. Calculate the value of the equilibrium constant
Compound A, optically active, with a formula of C6H14O reacts with Na2Cr2O7 in H2SO4 forms a new compound B with formula C6H12O and is optically active
The minimum volume % of vapor that gives a combustible mix is called the lower flammable limit (LFL). Generally, the LFL is about half the stoichiometric mixture, the concentration required for complete combustion of the vapor in air.
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.100 M HClO(aq) with 0.100 M KOH(aq). The ionization constant for HClO can be found here.
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.80 x 10^-4.
The temperature in the freezer compartment of a household refrigerator is kept at 0 F. On a summer day the ambient temperature is 92 F. The effective performance factor for the refrigerator (qc/w where qc is the heat removed from the frozen food c..
sample of KHP requires 19.27mL of NaOH to reach the end point. What is the concentration of NaOH?
A smple of mixture of NaCl, Caco3 and SiO2 weighed 7.30 grams. During the water wash the sample lost 2.21 grams. After treatment with HCL, the sample weighed 2.05 grams.
Use enthalpy of formation data to calculate the number of moles of CO2(g) produced per megajoule of heat released from the combustion of each fuel under standard conditions
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