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4 years ago

At 189k a sample of gas has a volume of 32.0cm. what does the gas occupy at 242k

Chemistry

1 answer:

sattari [20]4 years ago

5 0

<h2>Answer:</h2>

At 189 K volume = 32.0 cm

As volume of gas is directly proportional to temperature.

As the temperature increase the volume of gas will also increase.

Volume at 1 K = 32/189

Volume at 242 K = 32/189 * 242 = 40.97 cm.

Gas occupy 40.97 cm volume at 242 K.

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What can be said about an Endothermic reaction with a negative entropy change?The reaction isa. spontaneous at all temperatures.

Lyrx [107]

Answer:

1. d. The reaction is spontaneous in the reverse direction at all temperatures.

2. c. The reaction is spontaneous at low temperatures.

Explanation:

The spontaneity of a reaction is associated with the Gibbs free energy (ΔG). When ΔG < 0, the reaction is spontaneous. When ΔG > 0, the reaction is non-spontaneous. ΔG is related to the enthalpy (ΔH) and the entropy (ΔS) through the following expression:

ΔG = ΔH - T. ΔS [1]

where,

T is the absolute temperature (T is always positive)

<em>1. What can be said about an Endothermic reaction with a negative entropy change?</em>

If the reaction is endothermic, ΔH > 0. Let's consider ΔS < 0. According to eq. [1], ΔG is always positive. The reaction is not spontaneous in the forward direction at any temperature. This means that the reaction is spontaneous in the reverse direction at all temperatures.

<em>2. What can be said about an Exothermic reaction with a negative entropy change?</em>

If the reaction is exothermic, ΔH < 0. Let's consider ΔS < 0. According to eq. [1], ΔG will be negative when |ΔH| > |T.ΔS|, that is, at low temperatures.

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3 years ago

A dependent variable is

Anuta_ua [19.1K]

Answer:

a variable (often denoted by y) whose value depends of that of another.

Explanation:

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3 years ago

Question 5 of 10

vladimir1956 [14]

Answer:

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3 years ago

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A sample of n2 occupies 3. 0l at 3. 0atm. What volume will it occupy when the pressure is changed to 0. 5atm and the temperature

belka [17]

It will occupy 18 L volume when the pressure is changed to 0. 5 atm and the temperature remain constant.

Calculation,

According to Boyle law, the pressure of a given quantity of gas varies inversely with its volume at constant temperature.

$P_{1} V _{1} = k$ .....(i)

$P_{1}$ is initial pressure = 3 atm
$V _{1}$ is initial volume = 3L
k is constant

$P_{2} V _{2} = k$ (ii)

$P_{2}$ is final pressure = ?
$V _{2}$ is final volume = 0.5atm
k is constant

Combining equation (i) and (ii). we get,

$P_{1} V _{1} = P_{2} V _{2}$

3 atm× 3L= $V _{2}$ × 0.5atm

$V _{2}$ = 3 atm× 3L/0.5atm = 18 L

Boyle law used during respiration or breathing.

To Learn more about Boyle law

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2 years ago

If the moxie tank has an initial pressure of 50 atm in the winter what will be the pressure in summer

elena55 [62]

The pressure of the Moxie's tank in the summer will be 110.5 atm.

The correct option is C.

<h3>What is pressure law?</h3>

According to the pressure law, if the volume remains constant, for a given mass of gas, the pressure applied to the container's sidewalls is directly proportional to the gas's absolute temperature.

<h3>Briefing:</h3>

This law can be expressed mathematically as

P₁/T₁ = P₂/T₂

where

P₁ is the starting pressure.

The final pressure is P₂.

The starting temperature is T₁

The final temperature is T₂

The pressure of the gas increases as its temperature does.

As a result, since summertime temperatures are higher than wintertime temperatures, the pressure within the Moxie's tank will be higher than 50 atm throughout the summer.

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The complete question is -

If the Moxie's tank has an initial pressure of 50 atm in the winter, what will be point the pressure in the summer?

A. 5.88 atm

B. 22.6 atm

C. 110.5 atm

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1 year ago