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Constant pressure molar heat capacity of a compound is found to vary with temp, according to molar cp= 15.25 +.138* T--2.21*10^4/T^2Calculate the enthalpy change when 1 mole of this compound are heated from 295 K to 375 K at constant pressure of 1 atm.
How much energy (heat) is released when 1.9 moles of H2 reacts with 0.7 moles of Cl2 to create HCl(g) if the ΔHrxn = -184.6 kJ.
when 45.0 grams of C2H6 are completely combusted, 60 grams of water are produced. Is the ethane pure?
The equation for lowering the freezing point of a solvent is given in your manual. Given that the freezing point for the pure solvent is 79.5 , the molality is 0.15 , and the freezing point depression constant is 6.9 , determine the freezing tempe..
Use your experimentally determined value of ksp and show,by calculations, that Ag2CrO4 should precipitate when 5mL of 0.004M AgNO3 are added to 5mL of 0.0024 M K2CrO4.
A zero-order reaction has a constant rate of 2.40×10-4 M/rm s. If after 80.0 seconds the concentration has dropped to 7.00×10-2 M,
0,245g of the carbonate was found to exactly neutralise 23,6cm3 of HCl with a concentration of 0,150 mol/dm3.
What is the final temperature of the water when equilibrium is reached? (Assume a density of 0.998 (g/mL) for water.)
Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions. Mg(OH)2(s) Mg2+(aq) + 2OH-(aq).
When a sample of 5.00-g rams of Potassium thiocyanate is dissolved in H2O in a calorimeter that has a total heat capacity =6.225 kJ•K-1, the temperature decreases by 0.200 Kelvin. compute the molar heat of solution of Potassium thiocyanate.
Two samples of sodium chloride were decomposed into their constituent elements. One sample produced 2.84 g of sodium and 4.37 g of chlorine
How is a "charge" different from a mortgage?
What is the freezing point (°C) of a solution prepared by dissolving 11.3 g ofCa(NO3)2 (formula weight= 164 g/mol) in 115 g of water? Assume that i=3.00 for Ca(NO3)2 and the molal freezing point depression constant for water is1.86°C/m.
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