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Some reactions give off heat (exothermic), others absorb heat (endothermic). All reactions increase entropy.
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∙ 15y ago
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∙ 9y agoNot every chemical reaction is exothermic, or gives off energy. Some reactions actually absorb energy, and are considered endothermic. One of these is photosynthesis.
Wiki User
∙ 14y agoNo, other ways of a chemical reaction happening are heat, light, a new substance forming, and as you said a gas given off.
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∙ 13y agoEndothermic chemical reactions absorb heat and exothermic chemical reactions give off heat.
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∙ 11y agoNo, some chemical reactions take in energy
Wiki User
∙ 12y agoOnly chemical.
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∙ 12y agoenergey
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∙ 6y agoYou think probable to thermal energy.
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∙ 12y agoenergy
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Are phase changes physical or chemical in nature?
A phase change is a physical change. It is not a chemical change.
What energy changes take place when you use it?
omg like chemical and medical and your awesome
What two kinds of energy changes can take place during a chemical reaction?
Two types of energy changes that can occur in a chemical reaction are (1) endothermic and (2) exothermic. Endothermic is where energy is added to the system and exothermic is where energy is given off by the system.
How does chemical changes that take place inside your body help you?
they help you because it turns the food you eat into substances your body can use.
What changes occur to raw materials during the paper making process?
Papermaking is a series of physical and chemical changes. The physical and chemical changes will depends on raw material used and grade of paper manufactured. For a typical north American paper mill which uses wood for making copying paper, following changes will take place. Operation Type of Change Logging Physical Barking (Removal of bark) Physical Chipping Physical Screening Physical Cooking Chemical Washing Physical Chemical Recovery Chemical Bleaching Chemical Washing Physical Refining Physical Sizing Chemical & Physical Screening Physical Cleaning Physical Wet-end chemical addition Chemical & Physical Sheet Formation Physical Pressing Physical Drying Physical Calendaring Physical Winding Physical Rewinding Physical Cutting Physical
Are phase changes physical or chemical in nature?
A phase change is a physical change. It is not a chemical change.
When do atoms form chemical bonds?
Always get ready to give or take energy to get stability.
Do chemical changes take place when a mixture is made?
No!chemical changes do not take place when a mixture is made.The constituent substances of the mixture retain their own chemical composition.Thus only physical changes take place.
What shows changes that take place during a chemical reaction?
A chemical equation
Does a chemical change create a temperature change?
Almost all chemical changes release or take in energy, and thus do result in changes in temperature.
What energy changes take place in a car engine?
chemical
What changes take place in copra during storage?
chemical
What is meant by thermodynamics of a chemical reaction?
It refers to the energy changes that take place during a chemical reaction.
What chemical changes take place as food is being digested?
ewan
What are facts about change?
Chemical changes take place on the molecular level
Are changes that occur in mixtures and solutions physical or chemical?
chemical,because if you combined them you can't take it back out so it is in there for good so it is chemical
What are facts about physical and chemical change?
Chemical changes take place on the molecular level
