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3 years ago

Consider the statement below. “When nitrogen is liquefied, heat is released.” Is this statement true or false?

Chemistry

2 answers:

Alexxx [7]3 years ago

4 0

It is true because heat is released when a gas changes to a liquid

stellarik [79]3 years ago

3 0

Answer:

The state is true.

Explanation:

Phase change from solid to liquid to gas is an endothermic process. Heat is absorbed when solid melts or liquid evaporates. And the reverse is true. When gas liquefies or a liquid solidifies heat is released and the process is exothermic.

Therefore, when nitrogen gas turns to liquid nitrogen heat is released.

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What is the new pressure if the temperature outside is 296k and his weight causes the tire's volume to drop to 2.0 liters

sukhopar [10]

Question:

At standard temperature and pressure, the volume of a tire is 3.5L. What is the new pressure if the temperature outside is 296k and its weight causes the volume of the gas is 2.0 L?

Answer:

The new pressure is: 1.896 atm

Explanation:

At standard temperature and pressure, we have:

$P_1 = 1atm$

$T_1 = 273.15k$

$V_1 = 3.5L$

Outside, we have:

$T_2 = 296k$

$V_2 = 2.0L$

Required

Determine the new pressure

Using combined gas law, we have:

$\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}$

This gives:

$\frac{1 * 3.5}{273.15} =\frac{P_2*2.0}{296}$

Solve for $P_2$

$P_2 = \frac{296 * 1 * 3.5}{273.15*2.0}$

$P_2 = \frac{1036}{546.30}$

$P_2 \approx 1.896 atm$

7 0

3 years ago

What is melting point

Anarel [89]

the temperature at which a given solid will melt. from google

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3 years ago

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Does the fuse affect voltage or amperage?

guapka [62]

Fuse should only affect voltage

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3 years ago

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Which substance can be decomposed by chemical means?

sweet-ann [11.9K]

Are u sure this is the right option? Well, antimony can be decomposed. Including octane.

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3 years ago

What would you observe when zinc is added to solutions of iron II sulphate? write the chemical reaction that takes place.

kompoz [17]

Answer:

When zinc is added to the solution of iron sulphate, the colour of iron sulphate solution changes. It is because zinc is more reactive than iron, it displaces iron from its solution of iron sulphate and a grey precipitate of iron and a colourless solution of zinc sulphate is formed.

Explanation:

Zn(s) + FeSO4(aq) -----> ZnSO4(aq) + Fe(ppt.)

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3 years ago