The Combined Gas Law (Leaving Cert Chemistry): Quizzes

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The Combined Gas Law
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Which two gas laws does the Combined Gas Law bring together?

Boyle's Law and Charles' Law

What is the equation for the Combined Gas Law?

p1V1T1=p2V2T2\frac{p_1V_1}{T_1} = \frac{p_2V_2}{T_2}

How are pressure and volume related in Boyle's Law?

Inversely related

How are volume and temperature related in Charles' Law?

Directly related

What is another name for the Combined Gas Law?

General Gas Law

How do you convert Celsius to Kelvin for gas law calculations?

Add 273 to the Celsius value

What is the standard temperature at s.t.p.?

0°C (273 K)

What is the standard pressure at s.t.p.?

100 kPa

In which temperature unit must gas law calculations always be performed?

Kelvin

In the worked example, what final volume at s.t.p. was calculated?

64.84 cm³

What does the Combined Gas Law allow us to predict?

Gas behaviour when p, V, and T change

Why is unit consistency essential in Combined Gas Law calculations?

Units must match on both equation sides

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