STP Slides.key
STANDARD TEMPERATURE AND PRESSURE • Standard Temperature
and Pressure (called STP) is:
• Temperature:
0ºC (aka 273K)
1 atm (aka 760 mmHg or 101 kPa)
• Pressure:
• STP
is just an abbreviation that means that the temperature and pressure are exactly 0ºC and 1 atm.
• You
need to memorize this!!!
(A frozen beach at sea level! 1 atm and 0ºC!)
AN EXAMPLE... Mr. Bock took a marshmallow that was filled with 1.5mL gas bubbles at STP and warmed it up in the microwave to 546K. The gas bubbles got bigger, to 2mL. What was the new pressure in the bubbles, in atm?
Don’t solve this problem... just replace “STP” with the appropriate numbers.
AN EXAMPLE... Mr. Bock took a marshmallow that was filled with 1.5mL gas bubbles at STP and warmed it up in the microwave to 546K. The gas bubbles got bigger, to 2mL. What was the new pressure in the bubbles, in atm?
273K and 1atm Notice how I’ve used the “1 atm” value of STP so that the units match the other units in this problem! Now, this looks like a problem we’ve e h t d e riz o solved before! f m o e e r m u ess you r p e v d a H an e r u t ra ? e t e p y m P e t ST
A DIFFERENT EXAMPLE... Ms. Riley had a balloon that contained 3L of gas at STP. She then decreased the temperature to 200K and changed the pressure to 290mmHg. What was the new volume?
Don’t solve this problem... just replace “STP” with the appropriate numbers.
A DIFFERENT EXAMPLE... Ms. Riley had a balloon that contained 3L of gas at STP. She then decreased the temperature to 200K and changed the pressure to 290mmHg. What was the new volume?
273K and 760mmHg Notice how I’ve used the “760mmHg” value of STP so that the units match the other units in this problem!
SO REALLY... “STP” is just the lazy way of writing “273K and 1 atm” or of writing “273K and 760mmHg”
P.S. I’m serious. Have you memorized the temperature and pressure of STP yet?
SERIOUSLY. Did you memorize it yet? You need to memorize it.
and Pressure (called STP) is:
• Temperature:
0ºC (aka 273K)
1 atm (aka 760 mmHg or 101 kPa)
• Pressure:
• STP
is just an abbreviation that means that the temperature and pressure are exactly 0ºC and 1 atm.
• You
need to memorize this!!!
(A frozen beach at sea level! 1 atm and 0ºC!)
AN EXAMPLE... Mr. Bock took a marshmallow that was filled with 1.5mL gas bubbles at STP and warmed it up in the microwave to 546K. The gas bubbles got bigger, to 2mL. What was the new pressure in the bubbles, in atm?
Don’t solve this problem... just replace “STP” with the appropriate numbers.
AN EXAMPLE... Mr. Bock took a marshmallow that was filled with 1.5mL gas bubbles at STP and warmed it up in the microwave to 546K. The gas bubbles got bigger, to 2mL. What was the new pressure in the bubbles, in atm?
273K and 1atm Notice how I’ve used the “1 atm” value of STP so that the units match the other units in this problem! Now, this looks like a problem we’ve e h t d e riz o solved before! f m o e e r m u ess you r p e v d a H an e r u t ra ? e t e p y m P e t ST
A DIFFERENT EXAMPLE... Ms. Riley had a balloon that contained 3L of gas at STP. She then decreased the temperature to 200K and changed the pressure to 290mmHg. What was the new volume?
Don’t solve this problem... just replace “STP” with the appropriate numbers.
A DIFFERENT EXAMPLE... Ms. Riley had a balloon that contained 3L of gas at STP. She then decreased the temperature to 200K and changed the pressure to 290mmHg. What was the new volume?
273K and 760mmHg Notice how I’ve used the “760mmHg” value of STP so that the units match the other units in this problem!
SO REALLY... “STP” is just the lazy way of writing “273K and 1 atm” or of writing “273K and 760mmHg”
P.S. I’m serious. Have you memorized the temperature and pressure of STP yet?
SERIOUSLY. Did you memorize it yet? You need to memorize it.
