3 years ago

1) Describe how the atoms of a solid differ from the atoms of a liquid.

Physics

1 answer:

lisabon 2012 [21]3 years ago

6 0

Answer:

liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

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1.a source of ignition
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Communicate is 25 a multiple of 2 or 5 ? how do you know?

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2 years ago

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m_a_m_a [10]

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The conversions involved in this process are :

$0.00^0C=273K$

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Now we have to calculate the enthalpy change.

$\Delta H=n\times \Delta H_{fusion}$

where,

$\Delta H$ = enthalpy change = ?

m = mass of ice = 20.0 kg = $20.0\times 10^3g$ (1kg=1000g)

n = number of moles of ice= $\frac{\text{Mass of ice}}{\text{Molar mass of water}}=\frac{20.0\times 10^3g}{18g/mole}=1.11\times 10^3mole$

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Now put all the given values in the above expression, we get

$\Delta H=1.11\times 10^3mole\times 6010J/mole$

$\Delta H=6671100J=6671.1kJ$ (1 kJ = 1000 J)

Therefore, the enthalpy change is, 6671.1 kJ

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2 years ago