Question

At which condition will the entropy of a pure solid be zero?

Answer 1

when a substance is at absolute zero

Answer 2

The condition at which the entropy of a pure solid will be zero is when a substance is at absolute zero. Absolute zero is the lowest temperature that is theoretically possible, at which the motion of particles which constitutes heat would be minimal. It is zero on the Kelvin scale, equivalent to −273.15°C.