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Georgia [21]
3 years ago
14

A container is filled to a volume of 55.2 L at 61 °C. While keeping the

Chemistry
2 answers:
mel-nik [20]3 years ago
7 0

Answer:

\boxed {\boxed {\sf 4.45 \ atmospheres}}

Explanation:

We are asked to find the pressure given a change in volume. The temperature remains constant, so we are only concerned with volume and pressure. We will use Boyle's Law, which states the volume of a gas is inversely proportional to the pressure. The formula for this law is:

P_1 V_1= P_2V_2

The initial pressure is unknown, but the volume starts at 55.2 liters.

P_1 * 55.2 \ L = P_2V_2

The volume is reduced to 28.8 liters and the pressure is 8.53 atmospheres.

P_1 * 55.2 \ L = 8.53 \ atm * 28.8 \ L

We are solving for the initial pressure, so we must isolate the variable P₁. It is being multiplied by 55.2 liters. The inverse operation of multiplication is division, so we divide both sides of the equation by 55.2 L.

\frac {P_1 * 55.2 \ L }{55.2 \ L}= \frac{8.53 \ atm * 28.8 \ L}{55.2 \ L}

P_1= \frac{8.53 \ atm * 28.8 \ L}{55.2 \ L}

The units of liters (L) cancel.

P_1= \frac{8.53 \ atm * 28.8 }{55.2}

P_1=\frac{245.664 }{55.2 } \ atm

P_1 = 4.45043478261 \ atm

The original measurements of volume and pressure have 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredths place. The 0 in the thousandths place tells us to leave the 5.

P_1 \approx 4.45 \ atm

The initial pressure inside the container is approximately <u>4.45 atmospheres.</u>

babymother [125]3 years ago
5 0

Answer:

4.45 atm

Explanation:

Applying,

PV = P'V'............ Equation 1

Where P = Initial pressure of the container, V = Initial volume of the container, P' = Final pressure of the container, V' = Final volume of the container.

make P the subject of the equation

P = P'V'/V........... Equation 2

From the question,

Given: V = 55.2 L, P' = 8.53 atm, V' = 28.8 L

Substitute these values into equation 2

P = (8.53×28.8)/55.2

P = 4.45 atm

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What is the (a) frequency and (b) wavelength (in nm) of a source of purple light at the edge of the visible light spectrum?
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Answer: a) Frequency=666\times10^{12}Hz-789\times10^{12}Hz

b) Wavelength=380nm-450nm

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Wavelength is defined as the distance between two successive crests of a wave. It is represented as symbol \lambda.

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3 years ago
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We can prove a theory to be correct by performing the right experiment. False or true
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how much heat, in terms in q, would it take to produce the change in temperature indicated in the picture? what is your reasonin
STALIN [3.7K]

Answer:

1. q.

2. 2q.

3. 3q.

4. 6q.

Explanation:

We'll begin by calculating the specific heat capacity of the liquid. This can be obtained as follow:

Mass (m) = 25 g

Change in temperature (ΔT) = 20 °C

Heat (Q) = q

Specific heat capacity (C) =?

Q = MCΔT

q = 25 × C × 20

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Divide both side by 500

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C = 2×10¯³ qg°C

Therefore, the specific heat capacity of liquid is 2×10¯³ qg°C

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Heat (Q) =?

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Q = 50 × 2×10¯³ × 20

Q = 2q.

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3. Mass (m) = 25 g

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Specific heat capacity (C) = 2×10¯³ qg°C

Heat (Q) =?

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Q = 25 × 2×10¯³ × 60

Q = 3q.

Therefore, the heat required is 3q.

4. Mass (m) = 50 g

Change in temperature (ΔT) = 60 °C

Specific heat capacity (C) = 2×10¯³ qg°C

Heat (Q) =?

Q = MCΔT

Q = 50 × 2×10¯³ × 60

Q = 6q.

Therefore, the heat required is 6q.

4 0
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