The volume of a sample of argon gas is 138 mL at -150°C and 1 atm. Predict the volume of the sample at +150°C and 1 atm.
___ A. -138
___ B. 276
___ C. 475
___ D. Need more information
2007-10-02 20:23:03 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Use the Combined Gas Law
PV/T = Constant.
Just make sure to change the temperature to Kelvin by adding 273 to those Celsius temperatures.
2007-10-02 20:50:44 · answer #1 · answered by Farooq 3 · 0⤊ 0⤋
To the first answerer: How can you think a negative answer makes any sense at all? You forgot to convert temperatures to Kelvin before applying the formula.
The temperature change is from 123K to 423K, so the expected volume is 138 Ã 423/123 = 475mL. So answer C is correct.
2007-10-03 03:45:23 · answer #2 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
p1v1/T1= P2V2/T2
1* 138/ -150 = 1* V2/150
V2 = -138
ANSWER IS A
2007-10-03 03:36:57 · answer #3 · answered by komalsingh 2 · 0⤊ 1⤋