Final answer:
The movement of a molecule from a lower to a higher concentration usually requires an input of energy, suggesting that this process is not spontaneous and doesn't represent dynamic equilibrium or a state at equilibrium.
Step-by-step explanation:
When a molecule moves from a concentration of 10-4 M to 10-2 M, the molecule is moving against its concentration gradient, which means it is moving from an area of lower concentration to an area of higher concentration. This would typically require an input of energy, such as in active transport mechanisms. However, without additional context, it is impossible to determine the specific mechanism or if this movement is part of a larger process that might actually make it spontaneous. Nonetheless, based on the information typically covered under the topic of chemical equilibria, this would generally not be spontaneous and likely requires input of energy.
The concept of dynamic equilibrium refers to the situation where the net movement of molecules has ceased due to equal rates of crossing back and forth the membrane, but it is only reached when the concentration gradient no longer exists. The chemical equilibria reached suggests no net movement, differing from the scenario described in the question.
Thus, assessing the question purely on the basis of movement from low to high concentration, it would necessitate an input of energy.