Do you want it hot or cold?
The two thermodynamic systems, exothermic and endothermic can get confusing.
Look which way the flames are facing in each reaction, maybe a helpful way to remember and understand the two reactions.
Conclusion:
Here are the four laws of thermodynamics, that explain the way heat and energy work around us. I find it very confusing but I try to relate it to our everyday phenomenon.
For the 0th Law: A hot mug next to a cold mug, they would eventually have the same temperature. 1st Law: Well, I just remember this one. 2nd Law: I guess everyone relates this to our room that gets messy over time. And finally the 3rd Law: I imagine orderly salt crystals lattices that are nicely layered on top of each other representing the state of no disorders, quite the opposite of high entropy.
LAWS OF THERMODYNAMICS
The Laws
- Explanation
0th Law
- Two systems in thermal equilibrium are also in equilibrium with the third. All three systems are all thermal equilibrium with each other.
- Systems in thermal equilibrium also have the same temperature.
- This law establishes that temperature is the measurable property of substances.
1st Law
- Energy cannot be destroyed or created.
- ΔE = Q + W
- E = internal energy, Q = heat, W = work
2nd Law
- The total entropy of the universe must increase in every spontaneous reaction. Or an isolated system becomes disordered over time.
- ΔS total = ΔS system + ΔS surrounding > 0
- S = entropy
3rd Law
- There is no disorder in a pure perfectly crystalline substance.
- T (temperature)=0, K (Kelvin)=0
