What happens to the molecules when you heat a solid

Chemistry

2 answers:

Elena-2011 [213]3 years ago

8 0

The molecules vibrate faster and space between atoms increase

Norma-Jean [14]3 years ago

3 0

The molecules vibrate faster and the space between them is increased, the end result is that the object expands and takes up more space

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What will be the volume of a balloon at 98 kPa if its volume is 9.65 L at 235 kPa?

OlgaM077 [116]

<span>Boyle's Law or Boyle-Mariotte's Law: Under constant temperature, the volume occupied by a given fixed mass of a gas is inversely proportional to its pressure.

Formula:
</span> $\frac{ P_{1} }{ P_{2} } = \frac{ V_{2} }{ V_{1} }$
Product of extremes equals product of means
$P_{1} * V_{1} = P_{2} * V_{2}$

Data:
$P_{1} = 235\:kPa$
$V_{1} = 9.65\:L$
$P_{2} = 98\:kPa$
$V_{2} = ?$

Solving:
$P_{1} * V_{1} = P_{2} * V_{2}$
$235*9.65 = 98*V_{2}$
$2267.75 = 98V_{2}$
$98V_{2} = 2267.75$
$V_{2} = \frac{2267.75}{235}$
$\boxed{\boxed{V_{2} \approx 23.14\:L}}\end{array}}\qquad\quad\checkmark$

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What elements make up most of the mantle?

amid [387]

44.8% oxygen, 21.5% silicon, and 22.8% magnesium. There's also iron, aluminum, calcium, sodium, and potassium. These elements are all bound together in the form of silicate rocks, all of which take the form of oxides.

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If the elastic modulus of cobalt (co) is 200 gpa, and the elastic modulus of tungsten carbide (wc) is 700 gpa, calculate the upp

Dmitry_Shevchenko [17]

To determine the upper bond
Ec(u) = EmVm + EpVp
Em is the elastic modulus of cobalt.
E₁ is the elastic modulus of the particulate
Vm is the volume fraction of cobalt
Vp is the volume fraction of particulate
substitute
Ec(u) = 200 (Vm) + 700 (Vp)
To determine the lower bound
Ec (l) = EmEp/VmEp+ VpEm
Substitute
Ec (l) = 200(700)/Vm(700) + Vp (200)
Ec (l) = 1400/7Vm+2Vp

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Excited state occurs when the electrons are in the _ energy levels.

dexar [7]

Answer:

higher energy level s...........

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