Chemistry, 26.03.2020 01:38 Niah628

A sample of chlorine gas has a pressure of 7.25 kPa at 20.0°C. What will its pressure be at 60.0°C if its volume remains constant?

A. 2.42 kPa

B. 8.24 kPa

C. 21.8 kPa

D. 6.38 kPa

Answers: 3

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Answers

Answer from: skyleezarain487

The new pressure is 8.24 kPa (answer B is correct)

Explanation:

Step 1: Data given

Pressure of a sample chlorine gas = 7.25 kPa = 0.07155194 atm

Temperature = 20.0 °C = 293 K

The temperature increase to 60 °C = 333 K

The volume stays constant

Step 2: Calculate the new pressure

P1/T1 = P2/T2

⇒with P1 = the initial Pressure of a sample chlorine gas = 7.25 kPa = 0.07155194 atm

⇒with T1 = the initial temperature = 20.0 °C = 293 K

⇒with P2 = the new pressure = TO BE DETERMINED

⇒with T2 = the increased temperature = 60.0 °C = 333 K

0.07155194 atm / 293 K = P2 / 333 K

P2 = 0.08132 atm = 8.24 kPa

7.25 Kpa / 293 K = P2 / 333 K

P2 = 8.24 kPa

The new pressure is 8.24 kPa (answer B is correct)

Answer from: Quest

The answer to that would be magnesium

Answer from: Quest

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form( $n_2$ ) .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

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A sample of chlorine gas has a pressure of 7.25 kPa at 20.0°C. What will its pressure be at 60.0°C i...