객관식
At standard temperature and pressure (STP), 5.00 mol of an ideal gas occupies approximately what volume in liters?
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7. Gases
Standard Temperature and Pressure
객관식
Which of the following correctly defines the conditions for standard temperature and pressure (STP) in chemistry?
A
0°C and 760 mmHg
B
0°C and 1 atm
C
25°C and 1 atm
D
273 K and 1 atm
검증된 단계별 안내1
Understand that Standard Temperature and Pressure (STP) is a set of conditions commonly used in chemistry to define a reference state for gases.
Recall that the standard temperature is defined as 0°C, which is equivalent to 273 K. This is important because temperature in gas law calculations must be in Kelvin.
Recognize that the standard pressure at STP is 1 atmosphere (atm), which is equivalent to 760 mmHg or 760 torr. These units are interchangeable but 1 atm is the conventional unit used in STP definitions.
Combine these two conditions to define STP as 0°C (273 K) and 1 atm pressure. This is the internationally accepted standard for STP in chemistry.
Note that 25°C and 1 atm is often used as Standard Ambient Temperature and Pressure (SATP), which is different from STP.
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