CHEMISTRY COLLEGE

A battery can provide a current of 4.60 A at 3.40 V for 2.50 hr. How much energy (in kJ) is produced? 1st attempt kJ Energy

Answers

Answer 1

Answer:

Answer:

The energy produced equals 140.760 kJ

Explanation:

The relation between power, current and voltage is

$Power=Current* Voltage$

Applying the given values in the relation above we get

$Power=4.60* 3.40=15.64W$

Now Since $Power=(Energy)/(Time)\n\nEnergy=Power* Time$

Again applying the calculated values we get

$Energy=15.64* 2.50* 3600=140760Joules=140.76kJ$

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Consider an electrochemical cell based on the reaction: 2H+ (aq) + Sn (s) → Sn2+ (aq) + H2 (g) Which of the following actions would not change the measured cell potential? Consider an electrochemical cell based on the reaction: 2H+ (aq) + Sn (s) Sn2+ (aq) + H2 (g) Which of the following actions would not change the measured cell potential? addition of more tin metal to the anode compartment increasing the pressure of hydrogen gas in the cathode compartment lowering the pH in the cathode compartment increasing the tin (II) ion concentration in the anode compartment Any of the above will change the measured cell potential. Request Answer

Answers

Answer:

The only thing that will not affect the potential is the adition of solid Sn.

Explanation:

The potencial of a cell is linked to the concentration of the substances involved in the reactions by the equation of Nernst. So a change of one of them would change the cell potential.

$E=E^(\circ)-(R*T)/(n*F)*ln(Keq)$

The Keq for this reaction is:

$K_(eq)=([Sn^(2+)]*[H_2])/([H^+])$

Sn is not included because it's in solid state.

As can be seen, changing the concentrations of H2 (increasing the pressure), H+ (lowering the pH) or Sn2+ will affect the potential.

The only thing that will not affect it is the adition of solid Sn.

Based on the equilibrium constant equation, addition of Sn will not affect cell potential.

What is cell potential?

Cell potential refers to the potential difference that exists between two points in an electrochemical cell.

The Nerst equation shows the relationship between the cell potential and the concentration of the substances involved in the reactions.

$E=E^(\circ)-(R*T)/(n*F)*ln(Keq)E=E ∘ − n∗FR∗T ∗ln(Keq)$

Any change of one values results in a change in the cell potential.

The equilibrium constant for this reaction is given as follows:

$K_(eq)=([Sn^(2+)]*[H_2])/([H^+])$

Based on equilibrium constant equation, changing the amount of Sn will not affect cell potential since it is not included in the equilibrium constant equation.

Therefore, addition of Sn will not affect cell potential.

Learn more about cell potential at: brainly.com/question/19036092

Rank each of the following gases in order of increasing Urms assuming equivalent amounts and all gases are at the same temperature and pressure where 1 is the lowest Urms Gas 1: H2S Gas 2: He Gas 3: NF3 Gas 4: H20

Answers

Answer:

NF3< H2S< H2O< He

Explanation:

The average speed of a gas depends on the relative molecular mass of the gas. Lighter gases have a greater average speed and move faster than heavier gases.

Hence, we need to arrange these gases listed in the question in order of decreasing molecular mass in order to obtain the order of increasing Urms assuming equivalent amounts and all gases are at the same temperature and pressure.

Hence; NF3< H2S< H2O< He

Final answer:

The rank in order of increasing Urms for the gases given, assuming the same amount, temperature, and pressure is as follows: NF₃, H₂S, H₂O, and He.

Explanation:

Urms, or root mean square speed, of a gas, depends on the molar mass of the gas and the temperature. It is determined by the formula Urms = sqrt(3kT/M), where k is Boltzmann's constant, T is temperature, and M is the molar mass. The greater the molar mass, the lower the Urms. Looking at the molar masses of the gases H₂S (34 g/mol), He (4 g/mol), NF₃(71 g/mol), and H₂O (18 g/mol), we can rank them in order of increasing Urms as NF₃ 1st), H₂S (2nd), H₂O (3rd), and He (4th).

Learn more about Urms of gases here:

brainly.com/question/34151066

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What type of matter is pepperoni pizza

Answers

Answer:

Heterogeneous Mixture. Have a good day! =)

Explanation:

Balance P4O10 + H2O → H3PO4

Answers

Answer:

P4010 + 6H20 → 4H3PO4

Explanation:

i rlly h8 this lesson but idt chem anymore but i used to do these alot for the last past 2 yrs

p-4 p-1

o-11 o-4

h-2 h-3

(these r for me so dont rlly mind it)

hope it helped tho:)))

The higher the pH, the less acidic the solution

Answers

If the pH is higher the concentration of hydrogen ions becomes less and the solution becomes less acidic.

As the pH becomes lower, the concentration of hydrogen ions becomes greater, and the solution becomes more acidic.

HOPEIT'SHELPFUL:)

Answer:

yh thats true lol, ty for that very interesting fact

What are some examples of matter?

Answers

Answer:

An apple.

A person.

A table.

Air.

Water.

A computer.

Paper.

Iron.

Hope this helps you

Answer:

your boddy is made of mater and a clock too it is still a mater of time.

Explanation:

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