Which statement is true regarding R134A?

R134A is a hydrofluorocarbon refrigerant that was introduced as a replacement for R12 due to environmental concerns related to ozone depletion. When comparing the heat carrying capacity of R134A to that of R12, it is important to recognize that R134A actually has a lower capacity under similar conditions but is designed to operate at higher pressures which can impact the overall performance in a refrigeration cycle. However, it offers significant advantages in terms of environmental safety.

In some contexts, one might discuss heat flux or efficiency, but the primary distinction is that R134A is engineered to perform effectively as a more sustainable solution rather than directly outmatching R12 in every performance metric.

The other options focus on specific handling practices and compatibility which are critical for proper use, but the key takeaway is that R134A’s impact on heat transfer characteristics differs from R12, emphasizing the technological advancements aimed at improving environmental impact rather than providing a direct performance superiority in heat capacity.