A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 k. what will be the gas pressure when the temperature changes to 450 k? a gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 k. what will be the gas pressure when the temperature changes to 450 k? 1.5 atm 0.47 atm 0.94 atm 2.1 atm 1.1 atm

Answers

Answer 1

Answer: Using Gay-Lussac's Law, we have
P2 = $((T2)X(P1))/(T1)$
where, P and T stands for pressure and temperature respectively, terms 1 and 2 indicates initial and final pressure/temperature respectively.

Given that, P1 = 1.5 atm, T1 = 320 K, T2 = 450 K,
∴P2 = $((450)X(1.5))/(320)$ = 2.1 atm

Answer 2

Answer:

Final answer:

Using Gay-Lussac's Law, we calculate that when the temperature of a gas increases from 320 K to 450 K, the pressure of the gas will increase from 1.5 atm to 2.1 atm, assuming the volume and the amount of gas remain constant.

Explanation:

To answer the question, we need to use the concept in physics called Gay-Lussac's Law. This law states that the pressure of a given amount of gas held at a constant volume is directly proportional to the Kelvin temperature. It's also important to remember that when we're dealing with gases, temperatures have to be in Kelvin for our calculations to work.

Given that, we know that the initial pressure (P1) is 1.5 atm, the initial temperature (T1) is 320K, and the final temperature (T2) is 450K. We want to find the final pressure (P2). According to Gay-Lussac's law, this can be calculated using the following equation: P1/T1 = P2/T2.

Thus, P2 = P1 * T2 / T1 = 1.5 atm * 450K / 320K = 2.1 atm.

So, the gas pressure will be 2.1 atm when the temperature increases from 320 K to 450 K, assuming that the volume and the amount of gas remain constant.

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How does a scientific theory compare to a scientific law?

Answers

Answer:

Explanation:

Scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept.

A gas syringe contains 56.05 milliliters of a gas at 315.1 K. Determine the volume that the gas will occupy if the temperature is increased to 380.5 K.

Answers

The new volume of the gas if the temperature is increased to the given value is 67.68 milliliters.

What is Charles's law?

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

Initial temperature of gas T₁ = 315.1K

Initial volume of gas V₁ = 56.05mL = 0.05605L

Final temperature T₂ = 380.5K

Final volume V₂ = ?

V₁/T₁ = V₂/T₂

V₂ = V₁T₂ / T₁

V₂ = ( 0.05605L × 380.5K ) / 315.1K

V₂ = 21.327025LK / 315.1K

V₂ = 0.06768L

V₂ = 67.68 mL

The new volume of the gas if the temperature is increased to the given value is 67.68 milliliters.

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Answer:

Given: V1 = 56.05mL T1= 315.1K T2= 380.5K

Unknown: V2=?

Formula: V2=V1T2/T1

Solution: V2= 56.05mL x 380.5K/315.1K

Answer: V2=67.68mL

Explanation:

Consider the dissolution of 2.50 grams of salt XY in 75.0 mL of water within a calorimeter. The temperature of the water decreased by 0.93 oC. The heat capacity of the calorimeter is 42.2 J/oC. The density of the water (and the solution) is 1.00 g/mL. The specific heat capacity of the solution is 4.184 J/goC. Calculate the enthalpy change for dissolving this salt on a energy per mass basis (units of J/g).

Answers

The enthalpy change for dissolving this salt on a energy per mass is 136.32 J/g

How to determine the mass of the water

Density of water = 1 g/mL
Volume of water = 75 mL
Mass of water =?

Mass = Density × Volume

Mass of water = 1 × 75

Mass of water = 75 g

How to determine the heat absorbed by the solution

Mass of water = 75 g
Mass of salt = 2.50 g
Mass of solution (M) = 75 + 2.5 = 77.5 g
Temperature change (ΔT) = 0.93 °C
Specific heat capacity of the solution = 4.184 J/gºC
Heat of solution (Q) =?

Q = MCΔT

Q = 77.5 × 4.184 × 0.93

Q = 301.5618 J

How to determine the heat consumed by the calorimeter

Heat capacity of the calorimeter (C) = 42.2 J/ºC
Temperature change (ΔT) = 0.93 °C

Heat by calorimeter (H) =?

H = CΔT

H = 42.2 × 0.93

H = 39.246 J

How to determine the total heat released

Heat of solution (Q) = 301.5618 J
Heat by calorimeter (H) = 39.246 J

Total heat =?

Total heat = 301.5618 + 39.246

Total heat = 340.8078 J

How to determine the enthalpy change

Total heat = 340.8078 J
Mass of salt = 2.5 g

Enthalpy change (ΔH) =?

ΔH = Total heat / mass

ΔH = 340.8078 / 2.5

ΔH = 136.32 J/g

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Answer : The enthalpy change for dissolving this salt on a energy per mass basis is 132.4 J/g

Explanation :

Heat released by the reaction = Heat absorbed by the calorimeter + Heat absorbed by the water

$q=[q_1+q_2]$

$q=[c_1* \Delta T+m_2* c_2* \Delta T]$

where,

q = heat released by the reaction

$q_1$ = heat absorbed by the calorimeter

$q_2$ = heat absorbed by the water

$c_1$ = specific heat of calorimeter = $42.2J/^oC$

$c_2$ = specific heat of water = $4.184J/g^oC$

$m_2$ = mass of water = $Density* Volume=1/mL* 75.0mL=75.0g$

$\Delta T$ = change in temperature = $0.93^oC$

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

$q=[(42.2J/^oC* 0.93^oC)+(75.0g* 4.184J/g^oC* 0.93^oC)]$

$q=331.08J$

Now we have to calculate the enthalpy change for dissolving this salt on a energy per mass basis.

$\Delta H=(q)/(m)$

where,

$\Delta H$ = enthalpy change = ?

q = heat released = 331.08 J

m = mass of salt = 2.50 g

$\Delta H=(331.08J)/(2.50g)=132.4J/g$

Therefore, the enthalpy change for dissolving this salt on a energy per mass basis is 132.4 J/g

If element x has 55 protons how many electrons does it have

Answers

Answer: 55

Explanation: A atom consists of a nucleus and electrons.Nucleus contain neutrons with no charge and protons with positive charge. The electrons bearing negative charge revolve around the nucleus.

An electrically neutral atom contains equal number of protons and electrons. Thus if a neutral element X contains 55 protons, it also contains 55 electrons.

If the element has 55 protons it is celcium and it also has 55 electrons. It has an atomic mass of 133 (132.9) so to get the number of neutrons you subtract the atomic mass and the number of protons.

2KClO3 2KCl + 3O2In the reaction represented by this equation, two moles of KClO3 decompose to form 5 moles of product.

True
False

Answers

True, because most chemical reactions have more moles but not really.
Also that they decompose better. "not really"

Concerns over a global dependence on fossil fuels include environmental, economic, and social consequences.

Answers

The correct answer for above statement is:

True

Explanation:

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Concerns over a global dependence on fossil fuels include environmental, economic, and social consequences.

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