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3 years ago

Which way can heat never flow?

Chemistry

2 answers:

Elena L [17]3 years ago

7 0

Which way can heat never flow?

The wrong answer is a,c,d

The correct answer is b. Cold to Hot

Julli [10]3 years ago

4 0

B. cold to hot because any thing can flow from a area of higher concentration to an area of lower concentration

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For the following example, identify the following:

guapka [62]

Answer: Option (A) is the correct answer.

Explanation:

According to the Gibb's free energy conditions:

If $\Delta G$ < 0, then reaction is spontaneous.

If $\Delta G$ > 0, then reaction is non-spontaneous.

If $\Delta G$ = 0, then reaction is equilibrium.

Since, the given reaction is $F_{2}(l) \rightarrow F_{2}(g)$ . It denotes that liquid state of fluorine is changing into gaseous state. And, the boiling point of fluorine is very low.

Therefore, at low and high temperature fluorine is a gas. Hence, the reaction is spontaneous in nature.

Thus, we can conclude that the statement at low temperature, the reaction is spontaneous and $\Delta G$ < 0 and at high temperature, the reaction is spontaneous and $\Delta G$ < 0, is correct.

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3 years ago

The stomach and intestines allow a person to grow and survive by helping the body

ella [17]

helps you absorb nutrients

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4 years ago

Why does solid water (ice) float when placed in liquid water? *

Paul [167]

Answer:

Ice is less dense than water.

5 0

3 years ago

For each of the following compounds, state whether it is ionic or covalent, and if it is ionic, write the symbols for the ions i

kupik [55]

Answer :

Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.

The covalent compound are usually formed when two non-metals react.

Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.

All the polyatomic ions always form an ionic compound.

Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.

For the given options:

Option A: $KClO_4$

This compound is formed by the combination of potassium, $K^+$ which is a metal and $ClO_4^-$ ion which is a polyatomic ion. Thus, it will form an ionic compound.

Option B: $Mg(C_2H_3O_2)_2$

This compound is formed by the combination of magnesium, $Mg^{2+}$ which is a metal and $C_2H_3O_2^{-}$ ion which is a polyatomic ion. Thus, it will form an ionic compound.

Option C: $H_2S$

Hydrogen and sulfur, both are non-metals and they will form a covalent compound.

Option D: $Ag_2S$

This compound is formed by the combination of silver, $Ag^{+}$ which is a metal and sulfur, $S^{2-}$ which is a non-metal. Thus, it will form an ionic compound.

Option E: $N_2Cl_4$

Nitrogen and chlorine, both are non-metals and they will form a covalent compound.

Option F: $Co(NO_3)_2$

This compound is formed by the combination of cobalt, $Co^{2+}$ which is a metal and $NO_3^{-}$ ion which is a polyatomic ion. Thus, it will form an ionic compound.

6 0

3 years ago

A. Neutrons and electrons

Marianna [84]

Answer:

Explanation:

Because protons and neutrons make up the mass of an atom.

5 0

3 years ago