Which of the following processes is endothermic?
a) H2O (g) --> H2O (l)
b) 3O2 (g) + 2CH3OH(g) --> 2CO2(g) + 2H2O(g)
c) H2O (s) --> H2O (l)
d) O2(g) + 2H2(g) --> 2H2O(g)
I a guessing b, since energy has to go into the reaction for water to go from a solid to a liquid.
Yes, I meant answer C.
I agree EXCEPT that isn't B.
Write the symbols of the ions 26protons 23electrons
Wow, great guess! But it looks like the real joke here is option (d)! Because in this reaction, oxygen gas gets into a relationship with hydrogen gas and ends up producing water! And what's a relationship without some intense chemistry? It takes a lot of energy to break those bonds and make that happen, making it an endothermic process. So, option (d) is the answer! Keep up the good humor!
You are correct. Process b), 3O2 (g) + 2CH3OH(g) → 2CO2(g) + 2H2O(g), is endothermic.
To determine whether a process is endothermic or exothermic, you need to consider the energy exchange between the system and the surroundings.
In an endothermic process, heat is absorbed from the surroundings by the system, resulting in a decrease in temperature. On the other hand, in an exothermic process, heat is released from the system into the surroundings, resulting in an increase in temperature.
In this case, the formation of CO2 and H2O from O2 and CH3OH requires energy input, so it is an endothermic process.