Share Grade 6 ( Energy in chemical reactions )
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sodium metal explodes upon contact with water. ,,,,,,true or false
true
Formation of rust or tarnish can happen Immediately.....true or false
false
Acid rain is a fast reaction ..............true or false
false
Burning a log is a fast reaction .............true or false
true
..........Is the area on the outside of an object.
Surface Area
With increasing the surface area, The rate of the chemical reaction decreases.
false
.................Is the amount of the matter within a certain volume.
Concentration
With increasing the concentration of the reactants, the rate of the chemical energy increases. true or false
true
For molecules and atoms to form bonds, they must collide with each other. true or false
true
Rates of reactions are not affected by concentration and temperature............true or false
false
the greater the number of the collisions, the greater the rate of reaction. true or false
true
the more molecules present, the greater the probability of a collision and the faster the rate. true or false
true
the higher the temperature, the greater the kinetic energy and more likely they are to collide.
true
..........................Is the smallest amount of energy needed to start a chemical reaction.
Activation energy
,,,,,,,,,,,,,,,,,,,,,,,,,Is a substance that increases the rate of a chemical reaction.
A catalyst
The catalyst itself is used up in the reaction. true or false
false
