How do you know if thermodynamically favored?
A reaction is thermodynamically favorable when its enthalpy, ΔH, decreases and its entropy, ΔS, increases. Substituting the inequalities ΔH < 0 and ΔS > 0 into Equation 6.2. 2 shows that a reaction is thermodynamically favorable when ΔG is negative.
Why is exothermic favorable?
Low energy can be thought of as providing a greater degree of stability to a chemical system. Since the energy of the system decreases during an exothermic reaction, the products of the system are more stable than the reactants. We can say that an exothermic reaction is an energetically favorable reaction.
What is the difference between spontaneous and feasible reactions?
The words spontaneous and feasible are used interchangeably in several boards. Both are used to mean thermodynamically possible. Feasible means that there are no theoretical objections to the reaction postulated. Spontaneous means that the thermodynamics of the proposed process offer no obstacle.
Are reactions feasible?
Whether or not a reaction (or other physical change) is feasible depends on the sign of ΔG. If ΔG is positive, then the reaction isn’t feasible – it can’t happen. For a reaction to be feasible, ΔG has to be negative.
How do you know which is the strongest oxidizing agent?
The higher the electronegativity the greater the pull an oxidizing agent has for electrons. The higher the pull for electrons the stronger the oxidizing agent. So the element with the highest electronegativity is the strongest oxidizing agent.
How do redox reactions work?
Redox reactions are comprised of two parts, a reduced half and an oxidized half, that always occur together. The reduced half gains electrons and the oxidation number decreases, while the oxidized half loses electrons and the oxidation number increases.
How does a salt bridge keep the reaction going?
The electrons always flow from the anode to the cathode. The half-cells are connected by a salt bridge that allows the ions in the solution to move from one half-cell to the other, so that the reaction can continue.
What would happen if the salt bridge were removed?
Without the salt bridge, the solution in the anode compartment would become positively charged and the solution in the cathode compartment would become negatively charged, because of the charge imbalance, the electrode reaction would quickly come to a halt.
What is the function of a salt bridge in an electrochemical cell what would happen if the salt bridge were removed?
A salt bridge is necessary to keep the charge flowing through the cell. Without a salt bridge, the electrons produced at the anode would build up at the cathode and the reaction would stop running. Voltaic cells are typically used as a source of electrical power. By their nature, they produce direct current.
How does a salt bridge keep the reaction going quizlet?
The salt bridge provides an electrical connection between the two half-cells to complete the circuit. It allows ions to flow into or out of the half-cells to balance out the charges in the half-cells.
What is the purpose of a salt bridge in an electrochemical cell quizlet?
What is the purpose of a salt bridge in an electrochemical cell? A salt bridge provides electrical contact between the electrodes that make up the cell. A salt bridge carries electrons between the cathode and anode.
What is the purpose of a salt bridge in a voltaic cell quizlet?
The purpose of the salt bridge is to keep the solutions electrically neutral and allow the free flow of ions from one cell to another.
How does a salt bridge improve a battery?
Without a salt bridge, the cell would stop right after few seconds of the start. The role of the salt bridge is to assure the neutrality of both compartments. The salt bridge therefore, will pump negative ions (or anions) into the anode compartment and position ions (or cations) into the cathode compartment.
Do batteries need a salt bridge?
An important difference between modern batteries and classic galvanic cells is that new batteries are complete self-contained and require no salt bridges giving them an advantage over classic galvanic cells.
What is the purpose of a salt bridge?
The purpose of the salt bridge is to act as a source of spectator ions that can migrate into each of the half cells to preserve neutrality. Any charge buildup in the solutions of the two half cells is known as a junction potential.
What is the purpose of a salt bridge apex?
The salt bridge allows for ion transfer between the anode solution and the cathode solution. So, it maintains both solutions at a neutral state, meaning the electron flow will be able to continue for a more extended period of time.