elastic collision
The total energy of the gaseous system remains the same. In an ideal gas, the kinetic energy of the molecules is the only form of energy that affects the system's total energy. Collisions between A and B molecules will redistribute this kinetic energy, but the total energy of the system (sum of potential and kinetic energy) will not change.
thermal
The total amount of energy a substance contains can be quantified by its internal energy, which includes both the kinetic energy of its molecules (related to temperature) and potential energy from intermolecular forces. This total energy is influenced by factors such as temperature, pressure, and chemical composition.
Physical changes are usually reversible and chemical changes you can't usually reverse them. Frying an egg is chemical because you can't get the raw egg back. Freezing water would be physical... hope this helps! ----------- Chemical change is a change that imply modifications in the structures of molecules; new compounds appear. Ex.: burning of coal with releasing of carbon dioxide and water. Physical changes don't imply the structure modification of the molecules but only the state of matter, form, dimensions; the chemical compound remain unchanged. Ex.: grinding of coal to be used in a thermal power unit.
To calculate the change in enthalpy using bond energies, you need to subtract the total energy required to break the bonds in the reactants from the total energy released when the bonds are formed in the products. This calculation helps determine the overall energy change in a chemical reaction.
The total energy of the gaseous system remains the same. In an ideal gas, the kinetic energy of the molecules is the only form of energy that affects the system's total energy. Collisions between A and B molecules will redistribute this kinetic energy, but the total energy of the system (sum of potential and kinetic energy) will not change.
The total kinetic and potential energy of the molecules of an object is thermal energy.
Inelastic
internal energy
internal energy
THERMAL ENERGY
THERMAL ENERGY
Temperature is the measure of average kinetic energy of all the atoms and molecules in an object
A phase change does NOT chance the total number of molecules. There will be some evaporation and sublimation too. During the time that ice melts there will some molecules that sublimate to water vapor and also some water molecules evaporate to vapor. But the total mass and number of molecules will not change.
The total amount of energy doesn't change in this case.
THERMAL ENERGY
related to the motion of molecules