What is the typical temperature of exhaled breath?

The correct answer is based on the physiological understanding of human breath. The typical temperature of exhaled breath, which reflects the body’s internal temperature, is generally around 34 degrees Celsius. This temperature is lower than the core body temperature, which is approximately 37 degrees Celsius.

When air is exhaled from the lungs, it is influenced by the body's temperature at the time of exhalation, but it is also subject to cooling as it travels through the respiratory pathways. Hence, the exhaled air is generally warmer than the ambient temperature but lower than the internal body temperature.

Understanding the normal range of exhaled breath temperature is crucial in breath analysis contexts because it ensures that the instruments, like the Intoxilyzer 8000, can properly calibrate measurements and interpret results accurately. This knowledge helps in differentiating between temperature variations that could affect the reliability of breath alcohol testing.