Physical Chemistry Flashcards
1
Q
exothermic meaning
A
reaction or process accompanied by the release of heat.
2
Q
endothermic meaning
A
reaction or process accompanied by or requiring the absorption of heat.
3
Q
what can be observed in a physical change?
A
transition into solid, gas or liquid from original state change into crystal form change in flexibility change in durability change in shape change in size
4
Q
what can be observed in a chemical change?
A
emission of odour
change in temperature
formation of gas (bubbles)
formation of solid
5
Q
higher temperature makes molecules move ______
A
faster
6
Q
what changes will increase the rate of a chemical reaction?
A
increase in temperature
increase in concentration
increase in surface area
increase in speed of particles
