What is the effect of 1% carbon monoxide at 99 feet?

When considering the effects of carbon monoxide (CO) at depth, it’s important to understand how partial pressures of gases function under increased atmospheric pressure. At 99 feet underwater, divers are exposed to a pressure that is approximately three times the normal atmospheric pressure at sea level. This means that every gas in the breathing mixture, including carbon monoxide, is affected by this increase in pressure.

At the surface, a concentration of 1% CO in the air means that for every 100 parts of air, there is 1 part of carbon monoxide. However, at a depth of 99 feet, the pressure is about 3 atmospheres. Under this increased pressure, the partial pressure of carbon monoxide is multiplied by this factor. Thus, the 1% CO effectively becomes 3% CO when calculated for the higher pressure environment beneath the surface.

Therefore, the correct interpretation of the scenario is that inhaling air containing 1% CO at a depth of 99 feet is indeed equivalent to inhaling air containing 3% CO at the surface, making this the accurate choice in reflecting the real-life implications of diving and gas exposure at that depth. This understanding of gas partial pressures is crucial for ensuring the safety of divers and preventing toxic effects associated with