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Chemical reactions that occur spontaneously usually give off energy, usually heat.
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∙ 12y ago
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Is reactions a chemical or physical?
Chemical reactions are chemical processes.
What are the chemical reactions in which enzymes are involved?
enzymes involve in bio chemical reactions.
What do chemical changes always take in or give off?
Some reactions give off heat (exothermic), others absorb heat (endothermic). All reactions increase entropy.
Describe the role of energy in chemical reactions?
Chemical reactions that release energy often occur spontaneously. Chemical reactions that absorb energy will not occur without energy.
Why do chemical reactions always involve a change in energy?
Chemical bonds always break in chemical reactions, causing changes in energy.
Why is burning of gas considered a chemical change?
All burning reactions involve chemical reactions (chemical changes).
In Chemical reactions metals are considered electron because?
protons
Why are combustion reactions considered exceptions to the rules of chemical reactions?
Combustion Reactions are always reacted with Oxygen gas in this case if you had C3H8+O2 you will ALWAYS get H2O+CO2 it does not matter if you have C100H54+O2 you will still get H2O+CO2 this is why combustion reactions are considered exceptions to the rules of a product or chemical reaction.
Is metabolism considered the balance of chemical reactions within the organisms body?
metabolisim
What chemical reaction produces the sun and energy?
These are not chemical reactions but thermonuclear reactions.
How are chemical reactions abbreviated?
Chemical reactions are abbreviated by their chemical equations.
what refers to reactions that give off energy as they occur?
Such reactions are called Exothermic reactions. Their change in enthalpy is negative. Such reactions are favorable at low temperature.
Why is density considered physical property rather than a chemical property of matter?
The density doesn't involve chemical reactions, chemical changes. The density is a measurable property.
Is reactivity a physical or chemical property?
Chemical
How enzymes control chemical reactions?
enzymes helps control chemical reactions by the chemical in it called collagen when enzymes enter your body they create a chemical reactions and controls the chemical reactions you get by eating too much acids.
What comes out of chemical reactions?
4 useful chemical reactions are: fermentation, smelting combustion and electrolysis
Are reactions chemical?
Not ALL reactions are chemicals. When chemicals reacte with other chemicals it is called as chemical reactions.
