Multiple Choice
At standard temperature and pressure (STP), what is the volume occupied by 2 mol of chlorine gas (Cl_2)?
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7. Gases
Standard Temperature and Pressure
Multiple Choice
In which of the following locations would the air most likely be at standard temperature and pressure (STP)?
A
A mountaintop observatory with a temperature of 10°C and a pressure of 0.7 atm
B
A laboratory at sea level with a temperature of 0°C and a pressure of 1 atm
C
A deep underground mine with a temperature of 25°C and a pressure of 2 atm
D
A desert at noon with a temperature of 35°C and a pressure of 1.2 atm
Verified step by step guidance1
Recall the definition of standard temperature and pressure (STP), which is a temperature of 0°C (273.15 K) and a pressure of 1 atm.
Examine each location's given temperature and pressure values and compare them to the STP conditions.
For the mountaintop observatory: temperature is 10°C (which is higher than 0°C) and pressure is 0.7 atm (which is lower than 1 atm), so it does not match STP.
For the laboratory at sea level: temperature is 0°C and pressure is 1 atm, which exactly matches the STP conditions.
For the deep underground mine and the desert: both have temperatures and pressures that differ significantly from STP, so they are not at standard temperature and pressure.
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