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3 years ago

When a substance freezes, _____.

Chemistry

2 answers:

I am Lyosha [343]3 years ago

6 0

Answer:

It's temperature drops, and if releases thermal energy

Svetllana [295]3 years ago

3 0

Answer:

Its temperature drops

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What happens when a glass of water is set in the sun until the water

zalisa [80]

Answer:

D is the answer

Explanation:

6 0

3 years ago

In using the reaction quotient Q to analyze reaction progress, for the condition where Q<

Norma-Jean [14]

Answer:

The correct answer is reaction will achieve equilibrium by forming more products and will move in left to right direction.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_{eq}$

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

If Q > $K_{eq}$ , then the equilibrium will shift in left direction or in backward direction.the reaction will move back to the formation of reactants from the product
If Q < $K_{eq}$ , then the equilibrium will shift in right direction or in forward direction.The reaction will form more products

7 0

4 years ago

When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous E

Greeley [361]

Answer:

Spontaneous

Explanation:

For a spontaneous reaction , the value for the change in free energy or gibbs' free energy is negative .

The change in free energy , i.e. , ΔG , denotes the maximum amount of usable energy released , as going from initial state , i.e. , the reactant towards the final state , i.e. , the product .

And , the sign of the ΔG , determines whether the reaction is Spontaneous or non Spontaneous or at equilibrium ,

i.e. ,

ΔG < 0 , the reaction is Spontaneous

ΔG > 0 , the reaction is non Spontaneous

ΔG = 0 , the reaction is at equilibrium

For ,

ΔG < 0 , that the reaction proceed without any energy input , hence , it is Spontaneous in nature .

6 0

3 years ago

How many moles of NaCl will react completely with 18.5 L F2 gas at 300.0 K and 1.00 atm?

meriva

Hello!

Data:

P (pressure) = 1 atm
V (volume) = 18.5 L
T (temperature) = 300 K
n (number of mols) = ? (in mol)
R (Gas constant) = 0.082 (atm*L/mol*K)

Apply the data to the Clapeyron equation (ideal gas equation), see:
$P*V = n*R*T$

$1*18.5 = n*0.082*300$

$18.5 = 24.6n$

$24.6n = 18.5$

$n = \dfrac{18.5}{24.6}$

$\boxed{\boxed{n \approx 0,752\:mol}}\end{array}}\qquad\checkmark$

Note: If the feedback is to be considered, the closest response is 0.751 mol Nacl

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I hope this helps. =)

3 0

3 years ago

Energy is just like any other chemical or physical process, where it cannot be created or destroyed. Which Law states this fact?

Ganezh [65]

Answer:

Law of Conservation of Energy

Explanation:

5 0

4 years ago