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3 years ago

Which law states that the entropy of the universe is always increasing?

2 answers:

5 0

Second law of thermodynamics states entropy of the universe is always increasing. entropy always increases in a spontaneous process .

option B) second law of thermodynamics

for example if we keep a hot cup of coffee the heat is lost to surrounding and entropy( randomness increases) since it is a natural process entropy of universe increases.

svetoff [14.1K]3 years ago

4 0

Answer:

b. second law of thermodynamics

Explanation:

Entropy (S) is a measure of the extent of disorder or randomness of a system. Greater the disorder, higher (more positive) will be the entropy.

According to the second law of thermodynamics the energy of an isolated system always increases and evolves towards thermal equilibrium. Since the universe is essentially an isolated system, it implies that the entropy of the universe is always increasing.

The change in entropy (ΔS) is given in terms of the ratio of thermal energy of the system (q) and temperature (T). SI unit is J/K

$\Delta S=\frac{q}{T}$

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3 years ago

You are given a protein solution with a concentration of 0.15 mg/ml.

Thepotemich [5.8K]

Answer:

We need 2.933 L of 0.15 mg /mL of protein solution.

Explanation:

Concentration of given solution $C_1 = 0.15 mg/mL$

1 mg = 0.001 g , 1 mL = 0.001 L

$C_1=\frac{0.15\times 0.001 mg}{1\times 0.001 L}=0.15 g/L$

Molecular weight of protein = 22,000 Da =22,000 g/mol

Initial concentration in moles/liter:

$C_1=\frac{0.15 g/L}{22,000 g/mol}=6.8182\times 10^{-6} mol/L$

Initial concentration in micromoles/mL :

1 L = 1000 mL

$C_1=6.8182\times 10^{-6} mol/L=\frac{6.8182\times 10^{-6}\times 10^6 \mu mol}{1000 mL}=6.8182\times 10^{-3} \mu mole/ mL$

Initial concentration in micromoles/microLiter :

1 L = 1000,000 μL

$C_1=6.8182\times 10^{-6} mol/L=\frac{6.8182\times 10^{-6}\times 10^6 \mu mol}{1000000 \mu L}=6.8182\times 10^{-6}\mu mol/\mu L$

Moles of protein required = 20 μmoles

n(Moles)=C(concentration) × V(Volume of solution)

$20 \mu mol=6.8182\times 10^{-6}\mu mol/\mu L\times V$

$V =\frac{20 \mu mol}{6.8182\times 10^{-6}\mu mol/\mu L}$

$V=2.933\times 10^6 \mu L = 2.933 L$

We need 2.933 L of 0.15 mg /mL of protein solution.

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3 years ago

When many atoms are split in a chain reaction, a large explosion occurs. This is an example of what type of energy conversion? (

lara31 [8.8K]

Answer:

I think is chemical and nuclear

8 0

3 years ago

Read 2 more answers

Covalent solutes are considered non-electrolytes. What does this mean for the conductivity of the solution? A) Non-electrolytes

iogann1982 [59]

Electrolytes are those which dissociates in solution and produces ions.

Ions can carry current,so Electrolytes conduct electiricity.

And non electrolytes are those which do not dissociate in solution and doesnt produce ions.

Since non electrolytes do not produce ions they cannot conduct electricity.

Hence the right option is:

B) Non-electrolytes dissolve and do not dissociate in water providing no charged ions to conduct electricity.

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3 years ago

Read 2 more answers

Elements in group 1A all:

My name is Ann [436]

Answer:

The answer to your question is below

Explanation:

Elements in group 1A all:

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b. lose 1 electron This option is right.

c. are non-metals This option is incorrect, elements in group IA, are metals.

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4 years ago