Aprocess stream of pure methanol liquid enters a heat exchanger at 25°c and leaves as a vapor at 100°c. if methanol gas at 25°c were used instead at the same mass flow rate, the amount of heat required to reach 100°c would be

d. temperate deciduous forest

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

c. 75.7

i think that is the right