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faust18 [17]
3 years ago
8

Metals are really good thermal conductors for which of the following reasons? Select all that apply. Metals are really good ther

mal conductors for which of the following reasons?
Select all that apply.

Metals can absorb more heat flow than other elements before damage occurs.
Particles of metallic structure begin to vibrate faster as they absorb energy.
Metals have a larger number of freely moving electrons.
Metals have high densities.
Metals have high melting points.
Chemistry
2 answers:
prisoha [69]3 years ago
8 0

Explanation:

Metals are the substances that hold greater number of free electrons. Also, metals as utensil, cookware etc have molecules closer to each other.

Therefore, heat transfer becomes fast from one molecule to another. As a result, due to increase in degree of compactness, that is, density makes metals good conductor of heat.

Thus, we can conclude that metals are really good thermal conductors for the following reasons:

  • Particles of metallic structure begin to vibrate faster as they absorb energy.
  • Metals have a larger number of freely moving electrons.
  • Metals have high densities.
Natasha_Volkova [10]3 years ago
7 0

B. Particles of metallic structure begin to vibrate faster as they absorb.

C. Metals have a larger number of freely moving electrons.

D. Metals have high densities.

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The sample has a new pressure of 274kPa. If at 105 kPa and 275K, a 220 mL sample of helium gas is contained in a cylinder with a moving piston. The sample is pushed till it has a 95.0 mL volume and 310K .

The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume). Where P= pressure  V= volume and T = temperature.

From ideal gas equation

P₁V₁/T₁ =P₂V₂/T₂

105×220÷275 = P₂ ×95÷310

P₂= (105×220×310)÷(275×95)

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P2 = 274.105 kPa

Hence, the new pressure of helium gas is 274kPa

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brainly.com/question/28837405

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