How come there isn’t a conflict between the first law of thermodynamics and the theoretical scenario of the Heath Death theory?
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The certainty of the heat death of the universe if the universe is proven to be ever-expanding is in fact dictated by the laws of thermodynamics themselves
If the universe is ever-expanding, the volume of the universe is therefore always increasing. If energy cannot be created, then as the volume increases, the average amount of energy in any given place is constantly falling, and approaching the limit of zero energy per unit of volume. The next assumption is that life requires a given amount of energy to survive, and we have no evidence to really disprove that assumption at this point.
The expansion of the universe is generally confirmed by observation and there is little if any evidence to the contrary. It’s possible that the expansion is slowing down though, and that it eventually might contract back into a singularity and followed by another big bang.
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