Answered

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Given the unbalanced equation showing the reactants and product of a reaction occurring at 298 K and 100. kPa:

____P4(s) + ____Cl2(g) ____PCl3(l) + energy
Balance the equation below for the reaction, using the smallest whole number coefficients.

____P4(s) + ____Cl2(g) ____PCl3(l) + energy

Sagot :

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Balanced equation

P4(s) +6Cl2(g) ⇒4PCl3(l) + energy

Further explanation

Given

Reaction(unbalnced)

P4(s) +Cl2(g) ⇒PCl3(l) + energy

Required

Balanced equation

Solution

  • Give a coefficient

aP4(s) +bCl2(g) ⇒PCl3(l) + energy

  • Make an equation

P, left=4a, right=1⇒4a=1⇒a=1/4

Cl, left=2b, right=3⇒2b=3⇒b=3/2

The equation becomes:

1/4P4(s) +3/2Cl2(g) ⇒PCl3(l) + energy x 4

P4(s) +6Cl2(g) ⇒4PCl3(l) + energy

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