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3 years ago

Can you guys help me.

1 answer:

5 0

<span>1. Formula 2. Reactants 3. Atoms & molecules 4. Destroyed or created 5. Balanced 6. Mass number 7. 2Al(s) + 3CuCl2(aq) = 2AlCl3(aq) + 3Cu(s)</span>

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For the gaseous reaction of carbon monoxide and chlorine to form phosgene (COCL2)

Natasha_Volkova [10]

This is an incomplete question, here is a complete question.

For the gaseous reaction of carbon monoxide and chlorine to form phosgene (COCl₂)

Perform the following calculations:

A) Calculate ΔS at 298 K (ΔH= -220 kJ/mol and ΔG= -206 kJ/mol

B) Assuming that ΔS and ΔH change little with temperature, calculate ΔG at 450 K.

Answer :

(a) The value of ΔS at 298 K is, -0.0469 kJ/mol.K

(b) The value of ΔG at 450 K is, -199 kJ/mol

Explanation :

(a) According to Gibb's equation:

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

$\Delta G$ = Gibbs free energy = -206 kJ/mol

$\Delta H$ = enthalpy change = -220 kJ/mol

$\Delta S$ = entropy change = ?

T = temperature in Kelvin = 298 K

Now put all the given values in the above formula, we get:

$-206kJ/mol=-220kJ/mol-298K\times \Delta S$

$\Delta S=-0.0469kJ/mol.K$

Thus, the value of ΔS at 298 K is, -0.0469 kJ/mol.K

(b) According to Gibb's equation:

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

$\Delta G$ = Gibbs free energy = ?

$\Delta H$ = enthalpy change = -220 kJ/mol

$\Delta S$ = entropy change = -0.0469 kJ/mol.K

T = temperature in Kelvin = 450 K

Now put all the given values in the above formula, we get:

$\Delta G=-220kJ/mol-450K\times -0.0469 kJ/mol.K$

$\Delta G=-198.895kJ/mol\approx -199kJ/mol$

Thus, the value of ΔG at 450 K is, -199 kJ/mol

6 0

3 years ago

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of wate

meriva

Answer:

The answer to your question is molality = 0.22

Explanation:

Data

molality = ?

mass of glucose = 100 g

molar mass of glucose = 180 g

mass of water = 2.5 kg

Process

1.- Calculate the moles of glucose using proportions

180 g ------------------ 1 mol

100 g ------------------ x

x = (100 x 1) / 180

x = 100 / 180

x = 0.56 moles

2.- Calculate the molality

Formula

molality = moles / mass of solvent

- Substitution

molality = 0.56 / 2.5

- Simplification

molality = 0.22

6 0

3 years ago

You have been given an orange liquid and told to describe its properties.

chubhunter [2.5K]

Answer:

The correct answer would be - observing with the help of five senses.

Explanation:

To find and describe the physical properties of the given substance or the solution or liquid students can observe using their five senses. By looking at the liquid one can find its state and color, by smelling students can find the odor of the sample, by touching it one can observe and describe the texture.

Fluidity can also be measure by the touch if the solution is viscous or free-floating. By using a thermometer and using a graduated cylinder one can find the temperature at room temperature and the weight of substance respectively.

5 0

3 years ago

Which formula equation shows a reversible reaction?

pishuonlain [190]

Answer:2NaF is the correct one. It’s a simple combination and can be be split with relative ease

Explanation:

3 0

3 years ago

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Which group of factors are most important in determining the composition of ocean water? a.)temperature, salinity, and density b

Elis [28]

Temperature, salinity, and density are the group of factors are most important in determining the composition of ocean water.

a.)temperature, salinity, and density

<u>Explanation:</u>

The three fundamental factors that help in determining the composition of ocean water are temperature, salinity, and density. Temperature, saltiness, salinity, and density influence the thickness of seawater.

Enormous water masses of various densities are significant in the layering of the sea water (increasingly thick water sinks). As temperature builds water turns out to be less thick. As saltiness builds water gets denser. The temperature helps in deciding the pace of vanishing of the ocean.

3 0

3 years ago

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