Recall the following definitions
▪ A reaction that requires no outside energy source is classified as a natural process and is spontaneous.
▪ gain/requires energy, absorbs heat, temperature of the surroundings decreases
▪ involves breaking bonds (for phase change: solid → liquid → gas)
▪ ΔH is positive
Which of the following is true of melting ice at temperatures above 0°C?
a. It is not spontaneous.
b, It is not favorable.
c. It is endothermic.
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