How does ambient temperature affect propane tank pressure?

The relationship between ambient temperature and propane tank pressure is guided by the principles of gas laws, particularly the ideal gas law, which states that at a constant volume, the pressure of a gas is directly proportional to its temperature in Kelvin. As ambient temperature increases, the kinetic energy of the gas molecules increases, leading to an increase in pressure within the tank. Conversely, as temperature decreases, the kinetic energy of the gas molecules diminishes, resulting in a decrease in pressure.

Since propane behaves as a gas at room temperature but becomes a liquid under higher pressures, the pressure in a propane tank will vary based on the surrounding temperature. It is essential to monitor this pressure, as it directly impacts the safety and operational efficiency of propane systems. Understanding this relationship is crucial for handling and storing propane safely, which is why the correct assertion pertains to the decrease in pressure with lowering temperatures and not the constant or dramatic fluctuations suggested in the other options.