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2 years ago

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Sodium acetate spontaneously crystallizes out of a supersaturated solution upon standing or upon the addition of a seed crystal.

Which of the following is true for the thermodynamic quantities of this system for thisprocess?(a)ΔS < 0J/K, ΔH < 0 J(b)ΔS < 0J/K, ΔH > 0 J(c)ΔS > 0J/K, ΔH < 0J(d)ΔS > 0J/K, ΔH > 0J

1 answer:

AlekseyPX2 years ago

6 0

Answer:

Option (c) is correct.

Explanation:

According to 2nd law of thermodynamics, every spontaneous process is associated with increase in entropy ( $\Delta S>0$ ).

As sodium acetate crystallizes out spontaneously therefore it is associated with $\Delta S>0$ .

During crystallization, bond formation takes place which results evolution of heat. In other words, crystallization phenomenon is exothermic ( $\Delta H$ ).

So, the given crystallization process renders the following thermodynamic quantities- $\Delta S>0$ J/K and $\Delta H$ J

Option (c) is correct.

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1 year ago

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2 years ago

A gas occupies 200ml at a temperature of 26 degrees Celsius and 76mmHg pressure. Find the volume at -3degree Celsius with the pr

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Answer:

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Explanation:

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Equating equation (i), and (ii)

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2 years ago

Must show units and how they cancelli 1.) 175 km to um 3.) 385 nm to dm 5.) 492 um tom 7.) 52 x 103 dm to mm 9.) 321x 1035 mm to

morpeh [17]

Explanation:

1.) 175 km to μm

$1 km=10^9 \mu m$

$175 km=175\times 10^9\mu m=1.75\times 10^{11} \mu m$

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$1 nm=10^{-8} dm$

$385 nm=385\times 10^{-8} dm=3.85\times 10^{-6} dm$

5.) 492 μm to m

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7.) $52\times 10^3$ dm to mm

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17.) $5.26\times 10^3$ m to um

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1 m = $10^{-6} Mm$

$1.25\times 10^{35} m=1.25\times 10^{35}\times 10^{-6} Mm=1.25\times 10^{-29} Mm$

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$1 Tm = 10^{21} nm$

$4.22\times 10^3 Tm=4.22\times 10^3\times 10^{21} nm=4.22\times 10^{24} nm$

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2 years ago