At minus 10.00 degrees Celsius the entropy change of the universe for melting is negative, so melting is:

1. The same process can switch spontaneity with temperature. 2. At 10.00 degrees Celsius the universe entropy change is positive and melting is spontaneous. 3. At minus 10.00 degrees Celsius, or 263.15 K, that change is less than zero. 4. So melting is nonspontaneous at minus 10.0 degrees Celsius. 5. Temperature alone flips the verdict for the same process. _Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 16 'Thermodynamics', sections 16.1-16.4_