Inorganic Chemistry Answers

3. Given the following thermochemical equations,
C2H2(g) + 5/2 O2(g) → 2CO2(g) + H2O(l) ∆H = -1299.5 KJ
C(s) + O2(g) → CO2(g) ∆H = -393.5 KJ
H2(g) + ½ O2(g) → H2O(l) ∆H = -285.8 KJ
Calculate ∆H for the decomposition of one mole of acetylene, C2H2(g), to its elements in their stable state at 25oC and 1 atm.

How many L.atm are equal to 12.2 KJ of work?

5. When one mole of calcium carbonate reacts with ammonia, solid calcium cyanamide, CaCN2, and liquid water are formed. The reaction absorbs 90.1 KJ of heat.
a. Write a balanced thermochemical equation for the reaction.
b. Using Table 8.3, calculate ∆Hof for calcium cyanamide.

4. Given the following thermochemical equations
2H2(g) + O2(g) → 2H2O(l) ∆H = -571.6 KJ
N2O5(g) + H2O(i) → 2HNO3(l) ∆H = -73.7 KJ
½ N2(g) + 3/2 O2(g) + ½ H2(g) → HNO3(l) ∆H = -174.1 KJ
Calculate ∆H for the formation of one mole of dinitrogen pentoxide from its elements in their stable state at 25oC and 1 atm.

3. In photosynthesis, the following reaction takes place:
6 CO2(g) + 6 H2O(l) → 6 O2(g) + C6H12O6(s) ∆H = 2801 KJ
a. Calculate ∆H when one mole of CO2 reacts.
b. How many kilojoules of energy are liberated when 15.00g of glucose, C6H12O6, is burned in oxygen?

Which shall be burn completely to CO2 and water in the presence of sufficient amount of oxygen gas?

For N2(g) + 3 H2(g) ↔ 2 NH3(g), Kp = 4.34 × 10-3 at 300℃. What is Kp or the reverse reaction?

What mass of melamine, C3N3(NH2)3, will be obtained from 124.0 kg of urea, CO(NH2)2, if the yield of the overall reaction is 74.0 % ?
Express your answer to three significant figures and include the appropriate units.

an isotonic saline solution was prepared by dissolving 0.92g of NaCl in enough distilled water to make 100ml solution.what is the percent by mass/volume of the solution

What is the African indigenous explanation of where humans originated from?