Answer;
C) The solid has bubbles forming on its surface.
Explanation;
-Chemical reactions involves the reaction of reactants that involves rearrangement of their structure resulting to the formation of new substances.
-There are a number of common indicators that are used to show that a chemical reaction has taken place, namely;
- Change of color
- Change of Odor
- Change in temperature or energy
- Formation of precipitate
- Effervescence or formation of gas bubbles.
Hydrogen gas (H2) is always produced.
For the reaction;
N2(g) + O2(g) = 2NO(g)
Kp = pNO²/ pN₂pO₂; (No units)
where;
pNO is the partial pressure of NO;
pN₂ is the partial pressure of nitrogen
pO₂ is the partial pressure of Oxygen
The equilibrium constant Kp is deduced from the balanced chemical equation for a reversible reaction, NOT experimental data as is the case for rate expressions in kinetics.
Kp changes with temperature considerably changing the position of an equilibrium, and, at a constant temperature, and therefore constant K, the position of an equilibrium can change significantly depending on relative concentrations/pressures of 'reactants' and 'products'.
