What is combustion in physics

1 answer:

5 0

Combustion is a chemical reaction that occurs between a fuel and an oxidizing agent that produces energy, usually in the form of heat and light.

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How many joules are in 148 calories? (hint: 1 cal = 4.18 j)

Jet001 [13]

618.936 joules. Multiplied by 4.182 though, not much difference, but

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3 years ago

A diffusion coefficient KG was determined for the diffusion of a gas A through a stagnant film B [KG = 0.88 mol//h-ft2-atm].

Angelina_Jolie [31]

Explanation:

Transfer of mass A into stagnant film B depends on the availability of driving force.

Whereas driving force is the pressure difference at the surface of A and the bulk.

As, $N_{A} \propto (P_{A1} - P_{A2})$

$N_{A} = K_{G} \times (P_{A1} - P_{A2})$

Therefore, putting the given values into the above formula as follows.

$N_{A} = K_{G} \times (P_{A1} - P_{A2})$

= $0.88 \times (0.2 atm - 0.05 atm)$

= 0.132 $mol/h.ft^{2}$

Thus, we can conclude that the flux of A from a surface into a mixture of A and B is 0.132 $mol/h.ft^{2}$

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4 years ago

Which factors determine the length of a bond between two elements?

Tanya [424]

Answer:

The length of the bond is determined by the number of bonded electrons (the bond order). The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. Generally, the length of the bond between two atoms is approximately the sum of the covalent radii of the two atoms.

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3 years ago

Single covalent bond is preset in ---- •NH3 •NaCl •KCl •MgCl2 •Other:___

wariber [46]

Answer:

$\: \: \:$

•NH3(~￣³￣)~

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3 years ago

Apply the law of conservation of mass to explain how mass is conserved when water evaporates

frutty [35]

The law of conservation holds that mass can not be destroyed but can only take on different forms. So if 5 g of water becomes a gas it becomes 5 g of water vapor. The mass of the liquid water is simply transferred into the mass of the newly formed water vapor.

8 0

4 years ago