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3 years ago

5

Heat energy can be produced in many ways. Which of the following sources can produce heat energy? A. the Sun B. electricity C. b

urning wood D. all of these

2 answers:

Thepotemich [5.8K]3 years ago

6 0

Hi there:)

The answer to your question is D. all of these.

Hope this helps :)

~ TRUE BOSS

WINSTONCH [101]3 years ago

4 0

The answer is D. all of these

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How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909

makkiz [27]

Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atmosphere respectively.

1 mole of every gas occupy volume at STP = 22.4 L

The balanced chemical reaction is:

$2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)$

3909.9 kJ of of energy is produced by = $15\times 22.4=336L$

100 kJ of oxygen gas are needed to produce = $\frac{336}{3909.9}\times 100=8.59L$

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3 years ago

Give the name of the reaction that achieves the theoretical limits with respect to free energy in thermodynamics.a. reversible r

Assoli18 [71]

Answer:

The correct option is: a. reversible reaction

Explanation:

In thermodynamics, Gibb's free energy is the quantitative measure of the <u>spontaneity or feasibility </u>of a chemical reaction, at fixed temperature and pressure.

It can also be described as the <u>maximum available work obtained from a closed system</u>. This maximum work can only be achieved in a reversible process, <u>at fixed pressure and temperature.</u>

<u>The Gibb's free energy (ΔG) is given by</u>: ΔG = ΔH - T.ΔS

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3 years ago

Question 2 of 15

guapka [62]

Answer:

B. The products are nuclei of elements that are different from the original elements.

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2 years ago

Hdjshjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj???????????????

marshall27 [118]

Answer:

based on my knowledge

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3 years ago

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poizon [28]

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3 years ago