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jeyben [28]
3 years ago
9

BRAINLIESTT ASAP! PLEASE HELP :)

Chemistry
1 answer:
DanielleElmas [232]3 years ago
6 0

Answer:

The change during the burning of a match stick is a irreversible chemical change while the change when a liquid starts boiling is reversible chemical change.

You Helped Me Lol

Explanation:

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How many electrons will a fluorine (f) atom gain or lose in forming an ion?
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If the molar heat of combustion of liquid benzene at constant volume and 300k is -3272KJ. Calculate the heat of combustion at co
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Answer:

The heat at constant pressure is -3,275.7413 kJ

Explanation:

The combustion equation is 2C₆H₆ (l) + 15O₂ (g)  → 12CO₂ (g) + 6H₂O (l)

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We have;

\Delta H = \Delta U + \Delta n_g\cdot R\cdot T

Where R and T are constant, and ΔU is given we can write the relationship as follows;

H = U + \Delta n_g\cdot R\cdot T

Where;

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U = The heat at constant volume = -3,272 kJ

\Delta n_g = The change in the number of gas molecules per mole

R = The universal gas constant = 8.314 J/(mol·K)

T = The temperature = 300 K

Therefore, we get;

H = -3,272 kJ + (-3/2) mol ×8.314 J/(mol·K) ×300 K) × 1 kJ/(1000 J) = -3,275.7413 kJ

The heat at constant pressure, H = -3,275.7413 kJ.

4 0
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3 years ago
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