A gas is sealed in a bottle at 25°C and a pressure of 1.50 atm. How must the storage conditions be changed to bring the gas to standard temperature and pressure (STP)?
Answer
A
increase the temperature by 25°C and decrease the pressure by 0.514 atm
B
keep the temperature the same and increase the pressure by 98.5 atm
C
decrease the temperature by 25°C and decrease the pressure by 0.500 atm
D
increase the temperature by 100ºC and keep the pressure the same
Explanation
STP is 0°C and 1.00 atm. Starting from 25°C and 1.50 atm, the temperature must decrease by 25°C, and the pressure must decrease by 0.50 atm. Choice C gives both changes.
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