Question

At a temperature of 20°C (68°F), a refrigerant container cannot be filled, with liquid, beyond a maximum of _______________ of the internal volume:

a) 80%
b) 90%
c) 95%
d) 100%

Answer 1

At a temperature of 20°C (68°F), a refrigerant container cannot be filled, with liquid, beyond a maximum of 80% (option A) of the internal volume.

A refrigerant container at 20°C can be filled to a max of 80% of its volume. Warnings on containers emphasize safe storage due to the potential for pressure increase and explosion risks at higher temperatures. New pressure inside a warmed container can be deduced under the ideal gas law, assuming volume constancy.

Step-by-step explanation:

At a temperature of 20°C (68°F), a refrigerant container cannot be filled with liquid beyond a maximum of 80% (option A) of the internal volume. This is to allow for the expansion of the liquid as it warms and to prevent overpressure and possible container failure. The warning to store only at temperatures below 120 °F (48.8 °C) and not to incinerate is due to the fact that as the temperature increases, the pressure inside the can also increases, which can lead to the can bursting or exploding if the internal pressure exceeds the can's design limits.

The new pressure in the container after a temperature increase can be calculated using the ideal gas law, which states that the pressure and temperature of a gas are directly proportional when the volume is constant (assuming no change in the amount of gas inside the container). The exact calculation would require the initial and final temperatures, the initial pressure, and the assumption that the volume remains constant.

Answer 2

Refrigerant containers should not be filled beyond 80% of their internal volume at 20°C to allow for expansion. The storage warning and calculation of changes in gas pressure or fluid volume are due to the thermal expansion that occurs when temperatures increase. So, the correct option is a) 80% At a temperature of 20°C (68°F), a refrigerant container cannot be filled, with liquid, beyond a maximum of 80% of the internal volume:

Step-by-step explanation:

When referencing the filling of refrigerant containers at a temperature of 20°C (68°F), containers should not be filled beyond 80% of their internal volume. This allows for the expansion of the refrigerant as temperatures rise, preventing the container from rupturing or the relief valve from discharging due to overpressure.

For the provided scenarios:

Storage of pressurized containers should be below 120°F to prevent excessive pressure build-up, which can lead to explosions or leaks.

Thermal expansion of the gas can be calculated using the ideal gas law. For a can at 24°C increased to 50°C, we would calculate the new pressure while assuming constant volume and an ideal behavior for the gas.

Expansion of radiator fluid depends on its temperature increase and the fluid's coefficient of thermal expansion.

The precise answers to these thermal expansion and gas law problems would require the use of specific formulas and calculations, which are beyond the scope of this response.

So, the correct option is a) 80% At a temperature of 20°C (68°F), a refrigerant container cannot be filled, with liquid, beyond a maximum of 80% of the internal volume: