When a sample is heated water is observed at the top of the tube. The compound melts and changes color. Te residue is not entirely soluble. It is most likely Select one: a. deliquescent b. efflorescent c. a carbohydrate d. a hydrate

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

Idk the answer sorry

B"hf and f-"  is the correct answer took the test on edgenuity and got it right