Which data are shown on topographic maps? A. Population sizes of major cities
B. Information about elevation and slope
C. Relief of each area laid out in tiled squares
D. Variations in climate between geographic areas

Answer : A
explanation:
it gives information about elevation and slope

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.