Which is the best metal to use in an alloy to increase its electrical conductivity?

Given the following equations, determine the standard enthalpy of formation (ΔH∘f) for one mole of ICl3(g).I2(g)+3Cl2(g)⟶2ICl3(g

Natasha_Volkova [10]

The standard enthalpy of formation (ΔH°f) for one mole of ICl₃(g) is -88 kJ, as determined by Hess' law.

We want to determine the standard enthalpy of formation (ΔH°f) for one mole of ICl₃(g). The equation for which we are looking the enthalpy of reaction is:

0.5 I₂(s) + 1.5 Cl₂(g) ⟶ ICl₃(g)

We will use Hess' law, which states that the total enthalpy change during the complete course of a chemical reaction is independent of the number of steps taken. Let's consider the following thermochemical equations.

I₂(g) + 3 Cl₂(g) ⟶ 2 ICl₃(g) ΔH°298 = −214 kJ

I₂(s) ⟶ I₂(g) ΔH°298 = 38 kJ

We will add the reactions and their enthalpies. The resulting reaction is:

I₂(s) + 3 Cl₂(g) ⟶ 2 ICl₃(g) ΔH°298 = −-176 kJ

Finally, since we want to calculate the standard enthalpy per mole of ICl₃, we will divide the previous equation by 2.

0.5 I₂(s) + 1.5 Cl₂(g) ⟶ ICl₃(g) ΔH°298 = −88 kJ

The standard enthalpy of formation (ΔH°f) for one mole of ICl₃(g) is -88 kJ, as determined by Hess' law.

Learn more: brainly.com/question/22953190

6 0

2 years ago

A compound that allows for communication between one cell and the next is called _________

-Dominant- [34]

<h2>Answer:</h2>

The compound is known as the neurotransmitter or messenger chemicals.

<h3>Explanation:</h3>

Neurotransmitters are the chemicals a type of messenger which is used to transmit information from one cell to the next cell.
Some hormones are also known as messenger chemicals.
The nerve cells are not linked to each other while they are separated from each other by a space known as synapses.
The electric potential signal is converted into chemical signal by the release of neurotransmitters.
These neurotransmitter signal next cell to produce equal amount of electric signal in nerve cell.

7 0

3 years ago

Suppose of potassium iodide is dissolved in of a aqueous solution of silver nitrate. Calculate the final molarity of potassium c

swat32

Answer:

0.0983 M

Explanation:

First, we need to find the formulas of the reactants. Potassium forms the ion K⁺, and iodide is the ion I⁻, thus potassium iodide is KI. Silver forms the ion Ag⁺, and nitrate is the ion NO₃⁻, thus silver nitrate is AgNO₃. In the reaction, the cations will be replaced:

KI(aq) + AgNO₃(aq) → KNO₃(aq) + AgI(s)

AgI is an insoluble salt, so it will precipitate, and all nitrates are soluble, thus KNO₃ will be in the ionic form: K⁺ and NO₃⁻. 1 mol of KNO₃ = 1 mol of K⁺.

The molar mass of KI is 166 g/mol, thus the number of moles that is added is:

nKI = mass/molar mass

nKI = 5.71/166 = 0.0344 mol

And the number of moles of AgNO₃ is given as 64mM = 0.064 mol. Because the stoichiometry is 1:1, AgNO₃ is in excess, thus, all the KI will react and form 0.0344 mol of KNO₃. So, nK⁺ = 0.0344 mol. The molarity is the number of moles divided by the volume (350 mL = 0.350 L):

0.0344/0.350 = 0.0983 M

6 0

3 years ago

29 Positrons and beta particles have(1) the same charge and the same mass

Rama09 [41]

Usually the beta particles are electrons with negative charge. And positrons are with positive charge. So they have the same mass and different charges. The answer is (3).

8 0

3 years ago

The scientific method is one application of critical thinking.true or false

kumpel [21]

The best answer between the two choices would be the first option TRUE because the scientific method is used to do more advance research and investigation on things.

3 0

4 years ago

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