The products have a greater enthalpy that the reactants in reactions that are:
a) Exothermic
b) Formation reactions
c) Endothermic
d) Neutralizations
e) none of the above
a) Exothermic
are you sure?
Yes, I am sure. In exothermic reactions, the products have a lower enthalpy than the reactants. This is because exothermic reactions release energy in the form of heat, resulting in a decrease in the overall enthalpy of the system.
To determine the correct answer, let's break down the options and understand the concept behind them.
a) Exothermic reactions: In exothermic reactions, the energy is released to the surroundings in the form of heat. The energy of the products is lower than the energy of the reactants. Therefore, exothermic reactions have a lower enthalpy for the products compared to the reactants.
b) Formation reactions: Formation reactions are when a compound is formed from its constituent elements. These reactions may be either exothermic or endothermic. However, regardless of the type of reaction, the enthalpy of the products is determined by the sum of the enthalpies of formation of the products. Depending on the specific compounds involved, the enthalpy of the products could be greater or lower than the enthalpy of the reactants.
c) Endothermic reactions: In endothermic reactions, energy is absorbed from the surroundings. The energy of the products is higher than the energy of the reactants. Therefore, endothermic reactions have a greater enthalpy for the products compared to the reactants.
d) Neutralizations: Neutralization reactions occur when an acid reacts with a base and forms salt and water. These reactions can be exothermic or endothermic, depending on the specific compounds involved. Similar to formation reactions, the enthalpy of the products depends on the specific compounds, so it can be greater or lower than the enthalpy of the reactants.
Based on this analysis, we can conclude that the correct answer is:
c) Endothermic reactions
In endothermic reactions, the products have a greater enthalpy than the reactants.