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marysya [2.9K]
4 years ago
3

What is the second step in the dissolving process?

Chemistry
1 answer:
Aleonysh [2.5K]4 years ago
6 0

Endothermic is the second step in the dissolving process

Hope this helps have a nice day......

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Select the correct answer from each drop-down menu.
seraphim [82]

1. protons and neutrons

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4 years ago
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What volume will 75 g of O2 occupy at STP?
Nady [450]

p = latm

t = 273.15K

R= 0.08206 L atm mol K

75.0g02

16.00 (O₂) = 4.6875mol mol

9

Ideal gas law: PV = nRT, solve for volume: V = nRT P

V =

4.6875mol 0.08206 L-atm mol. K · 273.15K

V = 105L

latm

3 0
3 years ago
Consider the following equation. Fe2O3(s) 3H2(g) Right arrow. 2Fe(s) 3H2O(g) Delta. H = 98. 8 kJ, and Delta. S = 141. 5 J/K. Is
mestny [16]

The reaction is spontaneous at high temperatures, and non-spontaneous at low temperatures.

In a thermodynamically closed system, the measure of the non-expansion work by the system and the enthalpy and the entropy is said to be the <u>Gibbs free energy</u>.

<h3>How to determine the Gibbs free energy?</h3>

According to the reaction, the enthalpy change (\rm \Delta H) and the change in the entropy (\rm \Delta S) is positive. The Gibbs free energy is given by, \rm \Delta G = \Delta H - T \Delta S and the reaction will be spontaneous only when the \rm\Delta G is negative.

If there is not much effect on the enthalpy and entropy due to a decrease in temperature, then the value of the Gibbs free energy will be positive and will be close to that of the enthalpy change. In the above reaction enthalpy, change is positive and hence the reaction will be non-spontaneous.

When the temperature is increased then the entropy will affect the overall reaction as the Gibbs free energy will have the opposite sign as that of the entropy. So the reaction will become spontaneous at high temperatures.

Thus, option A is correct.

Learn more about Gibbs free energy here:

brainly.com/question/7988114

4 0
2 years ago
Sodium+cloride what is the moleculat mass​
lidiya [134]

Answer:

58.44 g/mol

Explanation:

just got done with this unit two weeks ago

3 0
4 years ago
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Which of the following is the number of hydrogen atoms in a mole of hydrogen gas at STP? pls i need help quickly
chubhunter [2.5K]

Answer:

C

Explanation:

The number of particles of any kind in 1 mol is 6.02*10^23.

How you modify that depends on the units.

The number of molecules in 1 mole of hydrogen is 6.02*10^23 molecules.

Each molecule consists of 2 atoms. Pure hydrogen at STP will have a multiplier of 2.

So the number of atoms is 2*6.02 * 10^23 = 1.20 * 10^24 atoms.

3 0
3 years ago
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