Equation a. C3H8(g) + O2(g) → CO2(g) + H2O(g) + 2220 kj is endothermic. + 2220 kj Equation b. 2 Na(s) + Cl2(g) → 2 NaCl(s) + 819kJ is also endothermic since the overall energy change is positive. + 819kJ The equation c. PCl5(g) + 67kj → PCl3(g) + Cl2(g) is endothermic since it requires anergy to proceed.
Hi, by definition an exothermic reaction is the one that generates heat as it occurs. An endothermic reaction on the other hand, consumes heat from the environment as it happens.
<u>This can be seen, when energy is put as a reactant in the equation. When it appears as a procuct the reaction is exothermic.</u>
What's wrong with this setup is the substrate on which you have positioned
the drop is "dirty and unclean" meaning it is not being dampened by
the solution. This action can be corrected by comprehensively cleaning the
substrate where the drop will be positioned.
