1. Calculate the bond energy of the reactants and products below. Then determine the heat of reaction for
the combustion of propane. Based on the heat of reaction you calculate, classify the reaction as
exothermic or endothermic. Show all work for full credit.

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Why do cells appear different in distilled water than they do in 10% salt water?