CHEMISTRY HIGH SCHOOL

Suggest what happens if we decrease the temperature of a reaction at dynamic equilibrium.

Answers

Answer 1
Answer: If the temperature of a reaction at dynamic equilibrium is decreased, the system will try to counteract the change by favoring the exothermic or heat-releasing reaction. This is governed by Le Chatelier's principle, which states that if a system at equilibrium is subjected to a change, it will react in a way that tends to counteract the change.

In this context, by decreasing the temperature, the system will shift in the direction that produces more heat, essentially favoring the exothermic reaction. This shift allows the system to absorb the added heat and counteract the temperature decrease.

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A piece of sodium metal reacts completely with water as follows: 2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 246 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)

Where does oxidation occur in an electrochemical cell?(1) at the cathode in both an electrolytic cell and a voltaic cell
(2) at the cathode in an electrolytic cell and at the anode in a voltaic cell
(3) at the anode in both an electrolytic cell and a voltaic cell
(4) at the anode in an electrolytic cell and at the cathode in a voltaic cell

Answers

Option No. 1 at the cathode in both an electrolytic cell and a voltaic cell

Negative ion arrives at the anode, attracted by electrostatic forces, where they lose electrons. Loss of electrons is defined as oxidation.

The reverse process occur at the negative electrode, where positive ions pick up electrons. They are reduced.

Answer : The correct option is, (3) at the anode in both an electrolytic cell and a voltaic cell.

Explanation :

As we know that there are two types of cell which are, electrolytic cell and electrochemical cell or galvanic cell.

Electrolytic cell : It is defined as the cell in which the chemical reaction occurs by passing of the current from external source.

In this electrolytic cell, the oxidation occurs at anode which is a positive electrode and reduction occurs at cathode which is a negative electrode.

Electrochemical cell : It is defined as the cell in which the chemical reaction occurs with the production of electric potential difference between the two electrodes.  It is also known as voltaic cell.

In this cell, the oxidation occurs at anode which is a negative electrode and reduction occurs at cathode which is a positive electrode.

From this we conclude that, the oxidation occurs at the anode in both an electrolytic cell and a voltaic cell.

Hence, the correct option is, (3) at the anode in both an electrolytic cell and a voltaic cell.

At stp what element is a good conductor of electricity?

Answers

copper is a good conductor

Why are alloys preferable at times?

Answers

Alloys are preferable at times because they offer interesting properties than pure metal. Alloys are made in order to modify or enhance properties, especially mechanical properties. Examples are stainless steel, brass and wrought iron.

What do sound waves, light waves, and ocean waves all have in common?A.
They all transfer energy.

B.
They are all electromagnetic waves.

C.
They all require a medium to travel.

D.
They are all mechanical waves.

Answers

The answer is option A

Which statement best compares the energy involved in melting with the energy involved in boiling for a given liquid?A....Energy is removed from the particles in each change, but more energy is removed in melting than in boiling because the attractions are weaker.

B....Energy is removed from the particles in each change, but more energy is removed in boiling than in melting because the attractions are weaker.

C....Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome.

D....Energy is added to the particles in each change, but melting requires more energy than boiling because the attractions must be completely overcome.

Answers

The correct answer is C.  When a solid turns into a liquid the intermolecular forces are just weakens enough to allow the molecules to move around each other.  When a liquid turns into a gas the intermolecular forces need to be completely broken since gases ideally do not have any attraction between its particles.  It takes a lot more energy to completely brake intermolecular attractions than it does to weaken them.  
I hope this helps.  Let me know if anything is unclear.

C. Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome.

Which of the following is another term for glucose? 1) Dextrose, 2) Sucrose, 3) Carbohydrate, 4) Table 5) Sugar.

Answers

Another term for glucose is "sugar." Glucose is a type of sugar that circulates in the bloodstream and serves as a primary source of energy for cells in the body.
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