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DaniilM [7]
3 years ago
11

The molar volumes of solid and liquid lead at the normal melting temperature of lead are, respectively, 18.92 and 19.47 cm3. cal

culate the pressure
Chemistry
2 answers:
Alexxandr [17]3 years ago
5 0

Answer:

ΔP = (ΔH / ΔV) ln(T2 / T1)

Explanation:

alexdok [17]3 years ago
4 0

We use the formula:

ΔP = (ΔH / ΔV) ln(T2 / T1)

where,

ΔH = change in enthalpy from solid to liquid = 4810 J/mol

ΔV = change in volume from solid to liquid = 0.55 cm^3/mol

T2 = 620 K, T1 = 600 K

 

So,

ΔP = (4810 / 0.55) ln(620 / 600)

ΔP = 286.76 J/cm^3

or converting to atm:

<span>ΔP = 2830 atm</span>

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Sodium is a silvery-white metal that reacts with chlorine gas, which is a yellow-greenish gas that is toxic. The reaction gives
Amiraneli [1.4K]

Answer:

Sodium is a silvery-white metal that reacts with chlorine gas, which is a yellow-greenish gas that is toxic. The  reaction gives off a lot of heat. After the reaction, which statement is true about the chemical properties of the product, sodium chloride?

Pure sodium reacts violently and sometimes explosively with water producing sodium hydroxide, hydrogen gas and heat

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

Chlorine is a very poisonous yellow green gas with a sharp odour that was used in gas warfare during WW1

Sodium and chlorine reacts with each other, however, to produce one of the most familiar substance used in cooking and preservation industry today Sodium Chloride or Common salt or table salt in the irreversible equation;

2Na(s) + Cl2(g) → 2NaCl(s)

Explanation:

It is easy to see why this reaction takes place so readily sodium has one electron in its outermost valence shell while chlorine has seven electrons in its valence shell. when sodium atom transfers one electron to chlorine atom forming a sodium cation (Na+) and a chloride anion (Cl-) both ions have complete valence shells and are energetically more stable. the reaction is extremely exothermic, producing a bright yellow light and a great deal of heat and fumes of sodium chloride.

In a reaction observation of the reaction process you will see sodium flares up almost immediately upon reaction with water.

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3 years ago
The statement “the scientific process is open ended” means:
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Answer:

think it helps you

<h2>Explanation:</h2>

<em><u>The statement “the scientific process is open ended” means: Would an element with 7 valence electrons be more or less reactive than an element with 3 valence electrons? Element 1 is a hard dark-red solid</u></em>

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