How many kilojoules of heat are absorbed
Calcium carbide (CaC2) can be made by heating calcium oxide (lime) with carbon (charcoal).? CaO(s) + 3 C(s) + heat As†' CaC2(s) + CO(g) Î"H = +464.8 kJ
How many kilojoules of heat are absorbed in a reaction in which 65.6 g C(s) are consumed?
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A galvanic cell is formed by connecting an iron (III)/ iron metal electrode to a zinc (II)/ zinc metal electrode through a suitable salt bridge. The cell exhibits a potential of 0.75 V at 25?C.
How much heat would be needed if the heating is at constant volume? Also how much heat is needed if the heating is at constant pressure?
A 150 mL aqueous solution containing .18M of a weak acid wasextracted with 50 mL of ether (organic phase). After theextraction, a 25mL aliquot of the aqueous phase required 20mL of.05M NaOH for titration ( to reach the equivalence point).
In 2 solutions of equal volume and mass, but with solutes of different identities, we learned that the solution that has the solute with a lower molecular weight will have a higher bioling point because there will be more moles in the solution.
A sample of N2 gas occupies 2.40 L at 20?C. If the gas is in acontainer that can contract or expand at constant pressure, at what temperature will the N2 occupy4.80 L?
Determine the ---> H°rxn for the reaction as written below. Assume that the density and heat capacity of the solutions is the same as that of water.
Energy must be added to overcome H bonds and dispersion forves between the strands. What is the sign of ΔG for theforward process when TΔS is smaller than ΔH?
If 27.5 mL of a 0.1 M NaOH solution is needed to neutralize 50.0 mLof an HCl solution, what was the initial molarity of the HCl solution?
Using the concepts of chemical kinetics, explain why food kept in the refrigerator or freezer does not spoil as quickly as food kept at room temperature. Address the effect of temperature on the microorganisms, but base your comments on chemical k
The element europium exists in nature as two isotopes: Eu-151 has a mass of 150.9209 amu, and Eu-153 has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu.
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