Study Guide Mix n Match: 1. Temperature is the measure of the Total energy of a substance. Average molecular kinetic energy of a substance. Average energy of a substance 2. Heat is measured in Calories Joules Either a or b. 3. Specific heat is the amount of heat One molecule contains. Transferred by one molecule Needed to change the temperature of one gram of a substance one degree. 4. Which has a higher specific heat capacity water or sand? Water Sand Both the same 5. Water is the most dense at -20oC 0oC 4oC
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.
Study Guide Mix n Match:
1. Temperature is the measure of the
-
- Total energy of a substance.
- Average molecular kinetic energy of a substance.
- Average energy of a substance
2. Heat is measured in
- Calories
- Joules
- Either a or b.
3. Specific heat is the amount of heat
- One molecule contains.
- Transferred by one molecule
- Needed to change the temperature of one gram of a substance one degree.
4. Which has a higher specific heat capacity water or sand?
- Water
- Sand
- Both the same
5. Water is the most dense at
- -20oC
- 0oC
- 4oC
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