0
This is due to changes in energy. Look at the chemical reaction A + B --> C . Say it requires a lot of energy for A and B to react together, but very little energy to keep C as C. All the energy you put into the reaction to make A and B turn into C will be released as heat once C is formed. However if it requires a lot of energy to keep C as C after the reaction happens, then the reaction will seem cold because it is taking energy in the form of heat out of its surroundings!
What else can I help you with?
During a temperature change what is happening to the substance?
A change of phase: melting, evaporation, liquefaction or chemical changes as thermal dehydration, thermal decomposition, oxydation, etc.
Can new compounds form during a physical change?
no because in a physical change it does not change the chemical make up, however, it does during a chemical change
Why is a baked potato chemical change?
At a high temperature (during boiling or frying) the composition of potatoes is modified - a chemical change.
Is it possible to have a temperature change without a chemical change?
Yes, a temperature change without a chemical change is possible. A piece of ice can melt into water and then evaporate into water vapor. These changes are all physical changes, and there must be a change in temperature for them to occur.
Do chemical changes affect the chemical structure of a substance?
Yes, chemical changes result in a change in the chemical structure of a substance. During a chemical change, new substances with different chemical compositions are formed through the rearrangement of atoms and bonds. This is in contrast to physical changes, where the chemical structure remains the same even though the physical properties may change.
In a chemical change energy does what?
In a chemical change, energy is either absorbed or released. This can result in changes in temperature, light production, or other forms of energy transfer during the reaction.
A change of occurs during both freezing and melting?
A change in temperature occurs during both freezing and melting. Freezing and melting are physical changes since the chemical contents of the matter do not change.
How does the enthalpy temperature dependence affect the overall energy changes in a chemical reaction?
The enthalpy temperature dependence influences the overall energy changes in a chemical reaction by affecting the heat absorbed or released during the reaction. As temperature increases, the enthalpy change also changes, which can impact the reaction's energy balance.
During a temperature change what is happening to the substance?
A change of phase: melting, evaporation, liquefaction or chemical changes as thermal dehydration, thermal decomposition, oxydation, etc.
Which property of matter changes during a chemical change but does not changes during a physical change?
The composition of matter changes during a chemical change as new substances are formed with different chemical properties. In contrast, the composition of matter remains the same during a physical change, with only the physical state or appearance of the substance being altered.
What shows changes that take place during a chemical reaction?
Evidence of a chemical reaction includes color change, formation of precipitate, evolution of gas, and changes in temperature. These changes can indicate that new substances are being formed through the rearrangement of atoms.
What properties do not change when matter changes state?
During phase changes the temperature of a substance does not change.
Is chemical energy related to chemical change?
Yes it is released/ absorbed during chemical changes.
Can new compounds form during a physical change?
no because in a physical change it does not change the chemical make up, however, it does during a chemical change
Does the temperature change during the day in Antarctica?
Yes, the temperature changes during the day everywhere on earth.
What is a process during which there are changes in pressure temperature and chemical make up?
Metamorphism
Why is a baked potato chemical change?
At a high temperature (during boiling or frying) the composition of potatoes is modified - a chemical change.
