CTL Carlos Almanza
ke'
COL TEACHING LEAD
144%
21. Which of the following is not a transformation from chemical energy to thermal
energy?
a, Coal is burned to boil water
b. An electric stove cooking food
C. Food is digested to regulate body temperature
d. Charcoal is burned in a grill
22. During most energy transformations some energy is transformed and released as
which of the following forms of energy?

sry but any answer choices

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

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