(A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the second is false, and (D) if the first sentence is false but the second is true. 1. Radioactive wastes, like uranium, must be handled and disposed of according to special regulations designed to protect people and the environment. Nuclear power plants produce too much greenhouse gases due to the burning of uranium. 2. In the experiment on determining the dissolved oxygen concentration of a water sample, the compound used to acidify the sample was hydrochloric acid. An acidic solution will have a pH greater than 7. 3. Pure water has a slight blue coloration that goes deeper as the thickness of the sample increases. Water follows the temperature of its surrounding. 4. The solubility of oxygen in water increases at colder temperatures, and decreases at higher temperatures. DO can be measured in milligrams of oxygen (O2) per liter of water. 5. An atom is composed of three subatomic particles: the proton, the electron and the nucleus. Atoms that have the same number of protons but different numbers of neutrons are isotopes of the same element.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
(A) if both sentences are true,
(B) if both sentences are false,
(C) if the first sentence is true but the second is false, and
(D) if the first sentence is false but the second is true.
1. Radioactive wastes, like uranium, must be handled and disposed of according to special regulations designed to protect people and the environment. Nuclear power plants produce too much greenhouse gases due to the burning of uranium.
2. In the experiment on determining the dissolved oxygen concentration of a water sample, the compound used to acidify the sample was hydrochloric acid. An acidic solution will have a pH greater than 7.
3. Pure water has a slight blue coloration that goes deeper as the thickness of the sample increases. Water follows the temperature of its surrounding.
4. The solubility of oxygen in water increases at colder temperatures, and decreases at higher temperatures. DO can be measured in milligrams of oxygen (O2) per liter of water.
5. An atom is composed of three subatomic particles: the proton, the electron and the nucleus. Atoms that have the same number of protons but different numbers of neutrons are
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