Charles' Law (Grade 11 NSC Matric Physical Sciences): Flashcards

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Charles' Law
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Charles' Law definition

Volume ∝ Kelvin temp (constant pressure & amount)

Volume change when gas is heated

Volume increases

Temperature scale required for Charles' Law

Kelvin

Formula: Celsius to Kelvin conversion

TK=TC+273T_K = T_C + 273

Most useful form of Charles' Law for calculations

V1T1=V2T2\frac{V_1}{T_1} = \frac{V_2}{T_2}

Value of absolute zero in Celsius

-273°C

How temp & volume changes relate (direction)

Same direction (both increase or both decrease)

Kinetic theory: why volume increases with temperature

Molecules move faster, collide harder, push walls outward

Constant ratio form of Charles' Law

VT=k\frac{V}{T} = k

Graph shape for V vs T (Kelvin scale)

Straight line through origin (0,0)

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