11. Ethene (C,H) reacts with oxygen to form carbon dioxide and water. The box be

Question

11. Ethene (C,H) reacts with oxygen to form carbon dioxide and water. The box below shows a mixture of reactants (ethane and oxygen) before any reaction occurs. The total pressure in the reactant mixture shown is 3.0 atm. Answer the questions that follow Co OO OO OO CO a. What is the partial pressure of ethene in the mixture? b. In the box below, draw all particles that would exist after the reaction goes to completion. Using your answer to part (b), is the total pressure in the container greater than 3.0 atm, less than 3.0 atm, or equal to 3.0 atm. Justify your answer. c.

Explanation / Answer

Q11

Ptotal = 3 atm

total molecules = 2 + 7 = 9

x-ethene = 2 / 9 = 0.222

P-ethene = x-ethene * Ptotal = 0.222*3 = 0.666 atm

b)

if reaciton goes to copmeltion

C2H4 + H2 = C2H6

then

mol of C2H6 formed = 2

mol of CH4 left =0

mol of H2 left = 9 - 2 = 7

c)

total P should be LESS than 3 atm, since there are LESS molecules

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