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kykrilka [37]
3 years ago
5

Research some ways in which scientists and engineers have harnessed and currently use the energy in fossil fuels to benefit soci

ety. Think about how these methods involve a chemical reaction, and explain how energy is conserved. Describe one method of using fossil fuels for energy, and state one advantage and disadvantage about this method. In your replies to others' comments, state whether you agree or disagree with the advantages and disadvantages they list and explain your reasoning.
Hint: Consider what happens to fossil fuels (such as coal, natural gas, and petroleum) when they are burned.
Chemistry
1 answer:
Anna [14]3 years ago
6 0

Answer:

Explanation:

Fossil fuels are fuels that are formed by naturally processes leading to the formation of crude oil, coal and natural gas.

Scientists and engineers have used the energy from these fossil fuels to benefit the society by converting these fuels into consumable products for engines which are used for various daily life routine, such as transport (as in the case of the combustible engines in cars, trains, airplanes and ships), power generation (as in the case of gas turbines for power generation, petroleum or diesel for the engines of power generators) and even for home use in food processing (as in the case of cooking gas).

The chemical reaction mostly involved in this process especially in the case of engines is combustion reaction. Combustion reaction is an exothermic reaction in which an organic substance is burnt in excess oxygen to produce carbon dioxide.  The energy conserved in this reaction (combustion reaction) is from stored potential energy (in the form of chemical energy) to thermal energy (which is the heat released when the hydrocarbon is burnt).

As mentioned earlier, one of the methods of using fossil fuels for energy is it's use in power generation by power generating sets (generators) and gas turbines. One advantage of using fossil fuel products for power generation is that it is cheaper than it's alternatives (such as solar power generation). However, one disadvantage of using fossil fuel products for power generation is that they release toxic gases/chemicals (such as carbon monoxide, CO, nitrogen oxides, NO and NO₂) into the atmosphere.

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What are the properties of aluminium and their use​
Wewaii [24]

Answer: Answers are in bulleted lists.

Explanation: Aluminum...

  • has a low density
  • is non-toxic
  • has a high thermal conductivity
  • has excellent corrosion resistance
  • can be easily cast, whether it's machined or formed.

Uses:

  • Aeroplane Parts
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Have a great day! :)

6 0
2 years ago
A student titrated 20 ml of 0.410 m hcl with 0.320 m naoh. determine the volume of naoh needed at equivalence point
Aleksandr-060686 [28]

Answer:

25.6mL NaOH

Explanation:

We are given the Molarity of the solution (\frac{moles}{liters}) and the volume of the solution (.02L).

By multiplying the two together, we can find the moles of solution that are reacted with HCl.

moles = \frac{.410 moles}{L} *.02L

This gives us .0082 moles of HCl.

We then find the moles of NaOH that are needed to react with the HCl using the equation.

HCl + NaOH = NaCl + H_{2} O

As HCl and NaCl have a 1:1 ratio, we need .0082 mol of NaOH.

Dividing this value by the Molarity of the solution

\frac{.0082mol}{.320mol/L}

Gives us the answer, in Liters (.0256), which we can then divide by 100 convert to mL.

3 0
3 years ago
A client presents with fatigue, nausea, vomiting, muscle weakness, and leg cramps. The laboratory values are as follows: sodium
Ganezh [65]

Answer: The laboratory value of potassium (3.0 mmol / L) is consistent with the client's symptoms of hypokalemia.

Explanation:

Hello!

Let's solve this!

Hypokalemia is a disorder in the body's electrolyte balance, when the decrease in blood potassium (K) ion levels is below 3.5 mmol / L. Potassium losses can occur through the digestive tract: such as vomiting and

diarrhea The most frequent symptoms of potassium loss include: tiredness, muscle weakness and cramping.

In conclusion, the laboratory value of potassium (3.0 mmol / L) is consistent with the client's symptoms of hypokalemia.

6 0
3 years ago
About 300 B.C., Aristarchus suggested that the sun was at the center of the universe. Why?
Bogdan [553]

The correct answer is option A and B

About 300 B.C., Aristarchus suggested that the sun was at the center of the universe because a) the brightness of the planets would change and b) the planets appeared to move among the constellations.

18 centuries before  Copernicus, Aristarchus predicted that  all planets orbit the sun. In other words, he suggested the Solar System is heliocentric.


7 0
3 years ago
7 Be + 2 HCl →BeCl2+ H2
Mashutka [201]

Answer:

The percent yield is 42.52%.

Explanation:

Theoretical yield of beryllium chloride = 12.7 g

Actual yield of the beryllium chloride = 5.4 g

The formula used for the percent yield will be :

\text{Percent yield}=\frac{\text{Actual yield}}{\text{Theoretical yield}}\times 100

Now put all the given values in this formula, we get:

\%(yield)=\frac{5.4 g}{12.7 g}\times 100=42.52\%

The percent yield is 42.52%.

3 0
3 years ago
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