Lorsqu'on verse du vinaigre sur la craie, il se forme un gaz. Avant de mélanger, on pèse le vinaigre et la craie : après avoir mélangé les deux espèces, on les pèse ensemble. Choisir parmi les 3 situations schématisées, celle qui représente l'état final

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.