Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The zeroth law of thermodynamics says that no heat is transferred between two objects in thermal equilibrium; therefore, they are the same temperature.
Q. What are the characteristics of an activated complex?
In a reaction with an activated complex, A and B form the complex A-B. The complex only forms if sufficient energy (the activation energy) is present. The energy of the activated complex is higher than that of either the reactants or products, which makes the activated complex unstable and temporary.
Table of Contents
- Q. What are the characteristics of an activated complex?
- Q. What is the activated complex in a potential energy diagram?
- Q. Does the temperature of a substance depends on how much of the substance is present?
- Q. What is the temperature of a substance a measure of quizlet?
- Q. During which two processes does a substance release energy?
- Q. Which change results in a release of energy?
- Q. Which temperature represents the highest average kinetic energy?
- Q. Which process is exothermic melting of copper?
- Q. Is cooking an egg in a frying pan exothermic or endothermic?
- Q. Is lighting a match an exothermic?
- Q. How is lighting a match an exothermic reaction?
Q. What is the activated complex in a potential energy diagram?
The activated complex (high energy intermediate state where bonds are breaking and forming) can be shown on potential energy diagrams. It is the ‘energy barrier’ that must be overcome when changing reactants into products.
Q. Does the temperature of a substance depends on how much of the substance is present?
Temperature is a measure of the average heat or thermal energy of the particles in a substance. Since it is an average measurement, it does not depend on the number of particles in an object. In that sense it does not depend on the size of it.
Q. What is the temperature of a substance a measure of quizlet?
Terms in this set (13) What does temperature measure? Temperature is how hot or cold something is and it is the measure of the average energy of motion of the particles of a substance.
Q. During which two processes does a substance release energy?
Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.
Q. Which change results in a release of energy?
The changes in matter that result in releases of energy are chemical changes, and nuclear changes (fusion and fission).
Q. Which temperature represents the highest average kinetic energy?
27°C
Q. Which process is exothermic melting of copper?
melting of copper: This involves conversion of solid to liquid and thus require energy and is endothermic. c. condensation of ethanol vapor: This involves conversion of vapor to liquid and thus release energy and is exothermic.
Q. Is cooking an egg in a frying pan exothermic or endothermic?
When you turn the stove on, heat is transferred to the pan. The heat causes a food, such as an egg, to change shape. This is an endothermic reaction that causes the food to be cooked.
Q. Is lighting a match an exothermic?
A match requires initial energy, provided by the heat generated from the friction as it strikes the rough surface on the matchbox to ignite it. Once the match starts burning, it releases more energy than was required for ignition so the reaction is still exothermic.
Q. How is lighting a match an exothermic reaction?
– when Energy is released along with a product, such reactions are called exothermic. During striking of a match, more heat energy is generated by friction than surrounding particles can take, resulting in flame.
