Is the state of matter of the sun and starsA. solidB. liquidC. gasD. plasma

3 answers
Question:

is the state of matter of the sun and stars A. solid
B. liquid
C. gas
D. plasma

Answers

The answer is C. Gas

idk

explanation:

but know think of it in terms of bond breaking and bond making.

h–h + h–h + o=o ==> h–o–h + h–o–h

as you can see from the diagram, theoretically, more energy is released by forming water, than was absorbed in breaking up the original hydrogen and oxygen molecules.

the energy level of the fuel + oxygen is higher than that of water.

therefore the fuel + oxygen mixture has the potential to release potential chemical energy as heat energy or, crucially, electrical energy, if the reaction can be made to go via  oxidation and reduction reactions involving electron transfer.

see this page for more details of the full  bond energy calculations

a  fuel cell  is a device to make electricity that functions like an electrical cell or battery that you supply with a fuel (liquid or gas) and an oxidant (oxidising agent, usually oxygen gas) which react together in a redox reaction (oxidation + reduction) to release energy as a flow of electrons i.e. an electrical current capable of doing useful work.

the oxidation of the fuel and the reduction of the oxidant reactions take place on electrodes (see diagram on right, all fully explained further down the page).

fuel cells essentially a device to release the chemical potential energy of combustible fuels as electrical energy  at a much lower temperature and without the flame!

so, the idea of a  hydrogen–oxygen fuel cell  is to release the energy from hydrogen reacting with oxygen, not as heat as in normal combustion in air, but as  useful electrical energy  i.e. a practical electricity supply.

hydrogen-oxygen fuel cells are much efficient than conventional power stations or batteries (e.g. zinc-carbon) because the electrical energy is directly generated from the chemical reaction between the oxidant and the fuel - there are no complications with boilers, turbines and generators.

in fossil fuel power stations, motor vehicles, coal/gas fires etc. quite a percentage of energy is lost as waste heat.

with a fuel cell there are fewer stages in producing the useful energy, so there is less opportunity to lose potentially useful energy e.g. waste heat, friction from moving parts etc.

a hydrogen–oxygen fuel cell is a non–polluting clean fuel since the only combustion product is water.

fuel cells  do not produce pollutants like carbon monoxide, sulfur dioxide and nitrogen oxides - gases you get from fossil fuel combustion in power stations or burnt road vehicles..

cars powered by fuel cells would be quite an environmental advantage in cities, where electric cars are already beginning to be significantly used in developed countries.

fuel cells could replace larger batteries which are not easily recycled and contain highly toxic metal compounds.

it would be an ideal fuel on this basis e.g. for motor vehicles, but that's not the only factor to consider!

it would be ideal if the hydrogen fuel could be manufactured by electrolysis of water e.g. using solar cells.

hydrogen can be used to power fuel cells.

it all sounds wonderful but, still technological problems to solve for large scale manufacture and distribution of 'clean' hydrogen gas or use in generating electricity and its rather an inflammable explosive gas!

explanation:

fuel cells e.g. the hydrogen-oxygen fuel electrical cell

fuel cells have to be supplied by an external source of fuel (e.g. hydrogen) and an oxidant e.g. oxygen or air.

the hydrogen or any other fuel is oxidised electrochemically inside the fuel cell to produce a potential difference i.e. a voltage capable of producing a working current.

the overall chemical reaction in a hydrogen fuel electrochemical cell involves the oxidation of hydrogen by oxygen to produce only water.

hydrogen fuel cells offer an alternative to rechargeable cells and batteries.

a fuel cell will produce a potential difference  ('voltage')  and a workable electric current until one of the reactants is used up.

hydrogen gas can be used as fuel.

it burns with a pale blue flame in air reacting with oxygen to be oxidised to form water.

hydrogen + oxygen  ==>   water

2h2(g)  + o2(g)  ==>   2h2o(l) 

Similar Solved Works

4 answers

13.3you borrow 100 shares of abc stock from your broker and sell them at $25/share (plus a $100 commission). two weeks later,

13.3you borrow 100 shares of abc stock from your broker and sell them at $25/share (plus a $100 commission). two weeks later, the stock price drops to $20/share. you buy 100 shares to return to the stockbroker and pay a $100 commission. what is your return on investment (calculate to the nearest sin...
3 answers

Aregular hexagon will have the maximum area for a given perimeter never sometimes always

Aregular hexagon will have the maximum area for a given perimeter never sometimes always...
4 answers

1. The parking charges at the Cahaya Hotel are calculated based on the rates below.TimeChargeThe first hour or part of itRM6.00Each

1. The parking charges at the Cahaya Hotel are calculated based on the rates below. Time Charge The first hour or part of it RM6.00 Each hour thereafter until the 6th hour RM5.00 Each hour thereafter RM3.00 Zamuddin parked his car from 0750 hours to attend a course at Cahaya Hotel. After the course...
4 answers

Canada TranCanada Tran jet costs $ 28 comma 000 comma 000$28,000,000 and is expected to fly 200 comma 000 comma 000200,000,000

Canada TranCanada Tran jet costs $ 28 comma 000 comma 000$28,000,000 and is expected to fly 200 comma 000 comma 000200,000,000 miles during its 88​-year life. Residual value is expected to be zero because the plane was used when acquired. If the plane travels 26 comma 000 comma 00026,000,000 miles...
3 answers

The sculptor captured ozymandias' passions as revealed in which lines?

The sculptor captured ozymandias' passions as revealed in which lines?...
3 answers

How are the core-optional and adaptive sleep theories the same?

How are the core-optional and adaptive sleep theories the same?...
1 answer

Abt Ohm's law, the current flowing in a wire varies inversely to the resistance of the wire. If the current is 5 amperes

Abt Ohm's law, the current flowing in a wire varies inversely to the resistance of the wire. If the current is 5 amperes (A) when the resistance is 24 Ohms, for what resistance will the current be 8 A?...
4 answers

The price of the printer was reduced from $400 to $180 . what was the percent decrease? amount of increase

The price of the printer was reduced from $400 to $180 . what was the percent decrease? amount of increase or decrease divided by amount of original multiplied by 100...
4 answers

Draw and properly fill the shells of nitrogen with electrons.​

Draw and properly fill the shells of nitrogen with electrons.​...
4 answers

A block of ice weighs -60 N. Use the table below.a. What is the magnitude of the max static friction of the ice sitting on top of a frozenlake?b.

A block of ice weighs -60 N. Use the table below. a. What is the magnitude of the max static friction of the ice sitting on top of a frozen lake? b. Someone pushes on the ice with a force of 3N to the right. What is the static friction now? c. The block starts moving. What is the magnitude of kinet...
4 answers

Answer this question 1/2w+2; w=1/9

Answer this question 1/2w+2; w=1/9...
5 answers

Which of the following statements best describes the relationship between the tang and song dynasties

Which of the following statements best describes the relationship between the tang and song dynasties...
3 answers

Competitive advantages are critical because they set the tone of the entire marketing program. Select one: True False quiz

Competitive advantages are critical because they set the tone of the entire marketing program. Select one: True False quiz...
2 answers

Assembly of proteins in a cell takes place ?

Assembly of proteins in a cell takes place ?...
3 answers

Can someone help? and explain

Can someone help? and explain [tex]Can someone help? and explain[/tex]...
2 answers

The running back for the bulldogs football team carried the ball nine times for a total loss 15 three

The running back for the bulldogs football team carried the ball nine times for a total loss 15 three over 4 yards find the average change...
3 answers

Create one line of grammatically correct dialogue using the following information:1) A flower talks rudely to a weed.2) Must use

Create one line of grammatically correct dialogue using the following information: 1) A flower talks rudely to a weed. 2) Must use a dialogue tag....
4 answers

3.Ask and answer. Use the пж көмектесіндерші өтінем ​

3.Ask and answer. Use the пж көмектесіндерші өтінем ​ [tex]3.Ask and answer.Use the пж көмектесіндерші өтінем ​[/tex]...
4 answers

A test sample with a cross-sectional area of 0.075 in2 and a 3.5” test length, is pulled apart in

A test sample with a cross-sectional area of 0.075 in2 and a 3.5” test length, is pulled apart in a tensile test machine. The Force-Displacement diagram (below) shows the information that was recorded during the test. Use the diagram to calculate the following information. Calculate the yield poin...
5 answers

Solve compound inequality 0<2x+3<10

Solve compound inequality 0<2x+3<10...

-- 0.029833--