Temperature changes Flashcards
1
Q
Matter possesses energy in the form of ………. and ……….. energy
A
- kinetic
- potential
2
Q
Internal energy of system
A
sum of kinetic and potential energy of all particles
3
Q
Exothermic
A
Releases energy to surroundings
Temperature rise
∆H = - ve
4
Q
Exothermic reactions EX
A
- Acids + Metals
- Neutralisation
- Combustion
- Hand warmers
- Thermite reaction
5
Q
Endothermic
A
Takes energy from surroundings
Temperature drop
∆ = + ve
6
Q
Endothermic reactions EX
A
- Melting ice
- Photosynthesis
- Cold packs
- Thermal decomposition of group 2 elements
6
Q
Endothermic reactions EX
A
- Melting ice
- Photosynthesis
- Cold packs
- Thermal decomposition of group 2 elements
