1))the following reaction, 4.27 grams of hydrogen gas are mixed with excess ethy
ID: 773081 • Letter: 1
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1))the following reaction, 4.27 grams of hydrogen gas are mixed with excess ethylene (C2H4). The reaction yields 58.4 grams of ethane (C2H6). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the theoretical yield of ethane (C2H6)? grams What is the percent yield for this reaction? % --------------------------------------------------------------------------------------- 2))For the following reaction, 6.64 grams of chlorine gas are mixed with excess water. The reaction yields 3.73 grams of hydrochloric acid. chlorine (g) + water (l) hydrochloric acid (aq) + chloric acid (HClO3) (aq) What is the theoretical yield of hydrochloric acid? grams What is the percent yield for this reaction? ------------------------------------------------------------------------------------------------- 3))For the following reaction, 5.14 grams of iron are mixed with excess chlorine gas. The reaction yields 13.4 grams of iron(III) chloride. iron (s) + chlorine (g) iron(III) chloride (s) What is the theoretical yield of iron(III) chloride? grams What is the percent yield for this reaction?Explanation / Answer
follow this if ---> 2 moles H2O , has a delta H = - 572 kJ then a) heat making 1.00 mol of H2O will be (-286kJ) & 286kJ will be evolved ------------------ if 2 moles H2 ---> , has a delta H = - 572 kJ & 4.03 g H2 = 2.00 moles H2 then b) 4.03 g H2 , will have a delta H = - 572 kJ & 572 kJ will be evolved -------------------- if 1mole O2 ---> , has a delta H = - 572 kJ & 186 grams O2 @ 32 g/mol = 5.81 moles c) then 5.81 moles @ 572 kJ/ mole = has a dH = - 3325 kJ & 3330 kJ will be evolved (3 sig figs) ------------ d) PV=nRT n=PV/RT n= (1.0atm)(2.0e+8L) / (0.08206 L.atm/mol.K)(298K) = 8.179e+6 moles of H2 How much heat was evolved 8.179e+6 moles of H2 @ 286kJ released per mole of H2= last answer= 2.3 e +9 kJ released (2.3 billion kJ released)
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