2 Pressure 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
3 Charles’ Law If temperature increases, volume increases If temperature decreases, volume decreasesThis is direct variation (compared to inverse for Boyle’s law)
4 Charles 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 )
5 Charles 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?
6 Charles’ Law First convert temperatures to Kelvin 4 + 273 = 277K
7 Charles’ LawMake a list of what you knowV1 =T1 =V2 =T2 =
12 Charles’ Law Put the information into the equation: V1 = V2 T1 T2 .5 = x
13 Charles’ Law Cross multiply to solve for x .5(277) = x(295) x = .47 Liters
14 Charles’ 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?
15 Charles’ Law Convert temperatures to Kelvin 20 + 273 = 293 K
16 Charles’ LawMake a list of what you knowV1 =T1 =V2 =T2 =
17 Charles’ law Make a list of what you know V1 = .4 L T1 = 293 K V2 = x
18 Charles’ law Put the information into the equation: V1 = V2 T1 T2 .4 = x
19 Charles’ law Cross multiply to solve for x .4(523) = x(293) x = .71 L