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3 years ago

A chemical bond joins

Chemistry

1 answer:

morpeh [17]3 years ago

4 0

The answer is c 3 molecules

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Sodium carbonate can be made by heating sodium bicarbonate: 2NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g) At 25°C, for this reaction,

insens350 [35]

Answer:

401.17 K is the minimum temperature at which the reaction will become spontaneous under standard state conditions.

Explanation:

The expression for the standard change in free energy is:

$\Delta G=\Delta H-T\times \Delta S$

Where,

$\Delta G$ is the change in the Gibbs free energy.

T is the absolute temperature. (T in kelvins)

$\Delta H$ is the enthalpy change of the reaction.

$\Delta S$ is the change in entropy.

Given at:-

Temperature = 25.0 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T₁ = (25.0 + 273.15) K = 298.15 K

$\Delta H$ = 128.9 kJ/mol

$\Delta G$ = 33.1 kJ/mol

Applying in the above equation, we get as:-

$33.1=128.9-298.15\times \Delta S$

$-29815\Delta S=-9580$

$\Delta S=-9580$ = 0.32131 kJ/Kmol

So, For reaction to be spontaneous, $\Delta G$

Thus, For minimum temperature:-

$\Delta H-T\times \Delta S=0$

$128.9-T\times 0.32131=0$

$T=\frac{128.9}{0.32131}=401.17\ K$

<u>Hence, 401.17 K is the minimum temperature at which the reaction will become spontaneous under standard state conditions.</u>

6 0

3 years ago

How many mole are there in carbon dioxide

Feliz [49]

Answer:

1 mole

Explanation:

8 0

4 years ago

Read 2 more answers

scientists want to place a telescope on the moon to prove their view of distant planets. The telescope weighs 200 pounds on Eart

vova2212 [387]

The weight itself technically will not change. The pull of gravity lessens, making it appear that it is lighter on the moon.

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4 years ago

Each element on the periodic table has a unique set of properties: Metal vs nonmetal; number of protons; atomic mass; number of

igomit [66]

The periodic table arranges elements in increasing
atomic number from left to right and top to bottom.
Horizontal rows on the periodic table are periods.
Elements in the same period have the same number of
electron shells.
Vertical columns on the periodic table are groups.
Elements in the same group have the same number of
valence electrons.

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2 years ago

find the mass of an object which is acted upon by a force of 650 n to produce an acceleration of 10m/ s2

Andreas93 [3]

Answer:

Explanation:

Mass = 650/10 = 65

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3 years ago