2Pressure can be in any units Volume can be in any units Boyle’s LawP1V1 = P2V2Pressure can be in any unitsVolume can be in any units
3Charles’ Law If temperature increases, volume increases If temperature decreases, volume decreasesThis is direct variation (compared to inverse for Boyle’s law)
4Charles Law Volume can be in any units Temperature must be in Kelvin V1 = V2T1 T2Volume can be in any unitsTemperature must be in KelvinTo convert Celsius to Kelvin, add 273(K = C )
5Charles law For example: The temperature inside my fridge is 4 C. If I place a balloon in my fridge that initially has a temperature of 22 C and a volume of .5 L, what will be the volume of the balloon when it is fully cooled by my refrigerator?
6Charles’ Law First convert temperatures to Kelvin 4 + 273 = 277K
7Charles’ LawMake a list of what you knowV1 =T1 =V2 =T2 =
12Charles’ Law Put the information into the equation: V1 = V2 T1 T2 .5 = x
13Charles’ Law Cross multiply to solve for x .5(277) = x(295) x = .47 Liters
14Charles’ Law For Example: A man heats a balloon in the oven. If the balloon initially has a volume of 0.4 L and a temperature of 20 C, what will the volume of the balloon be after he heats it to a temperature of 250 C?
15Charles’ Law Convert temperatures to Kelvin 20 + 273 = 293 K
16Charles’ LawMake a list of what you knowV1 =T1 =V2 =T2 =
17Charles’ law Make a list of what you know V1 = .4 L T1 = 293 K V2 = x
18Charles’ law Put the information into the equation: V1 = V2 T1 T2 .4 = x
19Charles’ law Cross multiply to solve for x .4(523) = x(293) x = .71 L