Units

[Tinisha 1G]

When we are calculating using the ideal gas law, should we put the temperature in Kelvins or in Celsius?

[Samantha Man 1L]

When you're using PV=nRT, the temperature should always be in Kelvin units not Celsius.

[megan blatt 2B]

Yes, you would put temperature in Kelvin. Usually when doing calculations, Kelvin is the unit that should be used.

[Margaret Akey]

always kelvin!

degrees celcius + 273.15 = kelvin

[005199302]

We use Kelvin because as Dr. Lavelle mentioned in the beginning of 14A, Kelvin is an absolute scale (0 K is absolute zero).

[Nicole Lee 4E]

The R constant's units are in Kelvin, so Kelvin should be used for temperature.

[Kyither Min 2K]

The units should be in Kelvin as the universal gas constant, R is in Kelvin. To find convert from Celsius to Kelvin just add 273.15.

[Hannah Yates 1K]

Use Kelvin. In most equations with temperature, you always use Kelvin

[LedaKnowles2E]

Since R is in Kelvin, use Kelvin. You almost always use Kelvin in chemistry.

[LeannaPhan14BDis1D]

Lavelle said due to the absolute 0 K we use Kelvin like the other people said

[Mhun-Jeong Isaac Lee 1B]

Yeah use K. Whenever you are confused as to which unit to use, look at the constant values in the equation and use the units that will cancel out with them. In this case of PV = nRT, R uses K.

[Lopez_Melissa-Dis4E]

Kelvin should be used when calculating these type of problems due to the fact that 0 Kelvin is absolute 0.

[riddhiduggal]

You should always convert temperatures to Kelvin in PV=nRT

[JadeSebti1L]

Yes, as people said before you should always use Kelvin. It is also important to note that you must match pressure units for whatever R constant you are using or else your answer will be incorrect. You can also convert to whatever units the question asks before plugging in your values to PV=nRT.

[Mariana Fuentes 1L]

You use Kelvin since R is in terms of Kelvin. If you were given a different temperature unit, you would have to convert it to Kelvin.

Example, 52 degrees Celsius to K.
C+273.15=K
52+273.15=300.15K

[Arta Kasaeian 2C]

The temperature is always plugged in as Kelvin. If the question concern the change in temperature in celsius, you calculate using kelvins and convert to celsius in the last step.

[PranitKumaran1F]

The units should be in kelvin using the ideal gas law equation

[404982241]

always use kelvins. add 273.15 to Celsius to get kelvins. remember to make sure that the temperature remains the same during the reaction/s.

[Brian Chang 2H]

Use Kelvin.

The Gas Constant is in Kelvin so we have to use the same measurement for temperature.

To get Kelvin, just add 273.15 to your Celcius measurement.

[Millicent Navarro 1I]

Always use Kelvin! If a problem states a temperature in Celsius (this is very common) or Fahrenheit, convert it to Kelvin.