Find the Unknown in the Combined Gas Law SbMoPoBr=1

$S b M o P o B r = 1$

Step 1

Use the combined gas law to find the missing variable in the equation. If the pressure, volume, and temperature are known for one state, and two of the three are known in the second state the law can be used to find the unknown.

$\frac{P_{1} V_{1}}{T_{1}} = \frac{P_{2} V_{2}}{T_{2}}$

Step 2

Fill in the known values.

$\frac{(P) (V)}{T} = \frac{(P) (V)}{T}$

Step 3

Solve for the unknown.

Since the expression on each side of the equation has the same denominator, the numerators must be equal.

$V \cdot V = V \cdot V$

Move all terms containing $V$ to the left side of the equation.

Subtract $V \cdot V$ from both sides of the equation.

$V \cdot V - V \cdot V = 0$

Subtract $V \cdot V$ from $V \cdot V$ .

$0 = 0$

Since $0 = 0$ , the equation will always be true.

Always true

Find the Unknown in the Combined Gas Law SbMoPoBr=1

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