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If a 4.4 g ice cube is placed in 350.0 mL of warm water, what is the change in temperature of the water after the ice has completely melted? The enthalpy of fusion of water is 6.02 kJ/mol, and the specific heat capacity of the liquid is 4.184 J/g/K. Assume that the amount of extra water produced by the melted ice is negligible.
Potassium hydroxide and phosphoric acid react to form potassium phosphate and water according to the equation. 3KOH(aq)+H3PO4(aq)---->K3PO4(aq)+3H2O(l)
What is its fate as cooling occurs? To help address the question, calculate the equilibrium constant at 298 K and 1300 K for each reaction: ½ O2(g) + NO(g) ? NO2(g)2 NO2(g) ? N2O4(g)
what is the molar heat of vaporization in kilojoules per mole if its vapor pressure at 20C is 540 torr?
How many grams of water can be cooled from 30 degrees C to 18 degrees C by the evaporation of 49g of water? (The heat of vaporization of water in this temperature range is 2.4kJ/g . The specific heat of water is 4.18J/k
Compute the amount of heat liberated when 6.07 g of n-octane is burned completely with excess oxygen to form carbon dioxide and liquid water.
What is the molar mass of the unknown compound if the solution has a freezing point of -5 oC?
Pd has a FCC lattice in which hydrogen atoms occupy octahedral holes. If 70% of the holes are filled by hydrogen atoms and the lattice does not expand upon hydrogenation, how many grams of hydrogen will be contained in one cubic centimeter of the ..
An isotonic solution is described as 0.92% NaCl (g/mL). Would this also be the required concentration for isotonic solutions of other salts, such as KCl, MgCl2,
Calculate the change in pH when 9.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
if the syinge colume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R?
Estimate the temperature at which calcium carbonate is likely to decomp under 1atm of pressure. Reaction: CaCO3(s) -> CaO(s) + CO2 (g) For this rxn: dHstandard = 177.8 kJ and dS standard= 160.5 J/K (notice unit differences)
Experiment you measured teh effect of changing temperature on the pressure of a conatined gas at constant volume.
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