What is the value for (delta)G at 1000 K if (delta)H = -220 kJ/mol and (delta)S = -0.05 kJ/(molK)?A. -220 kJ
B. -270 kJ
C. 780 kJ
D. -170 kJ
Answers
The value of ΔG is -170 kJ/mol at 1000 K if ΔH is -220 kJ/mol and ΔS is -0.05 kJ/mol K.
Hence, option (D) is correct answer.
What is Gibbs Free energy ?
Gibbs free energy is also called free energy, free enthalpy, Gibbs energy which is used to measure the capacity of a system to do work in a thermodynamic system. It is denoted by the symbol 'G'.
How to calculate the Change in free energy (ΔG) ?
To calculate the change in free energy as
ΔG = ΔH - T ΔS
where,
ΔG = Change in free energy
ΔH = Enthalpy change
T = Temperature in Kelvin
ΔS = Entropy change
Now put the value in above formula we get
ΔG = ΔH - T ΔS
= -220 kJ/mol - (1000 K) (-0.05 kJ/mol K)
= -220 + 50
= -170 kJ/mol
Thus, from above conclusion we can say that The value of ΔG is -170 kJ/mol at 1000 K if ΔH is -220 kJ/mol and ΔS is -0.05 kJ/mol K.
Hence, option (D) is correct answer.
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(delta)G = (delta)H - T (delta) S
Plugging in the given values:
(delta)G = -220 kJ/ mol - (1000K) (-0.05 kJ/mol K)
(delta)G = -170 kJ/mol
If we take a basis of 1 mol, the answer is
D. -170 kJ
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solution of KOH, what is the concentration of
HNO3?
(1) 1.0 M (3) 3.0 M
(2) 1.5 M (4) 0.5 M
Answers
Answer : The correct option is, (2) 1.5 M
solution :
According to the neutralization law,
where,
= molarity of
solution = ?
= volume of
solution = 50 ml
= molarity of KOH solution = 0.50 M
= volume of KOH solution = 150 ml
Now put all the given values in the above law, we get the volume of solution.
Therefore, the concentration of is, 1.5 M
Answers
Answer:
filtration: pore sizes less than 0.45 micrometers
Explanation:
b. move from their ground states up to excited states.
c. attach to the nucleus.
d. form a bond with the nearest proton.
Answers
When electrons absorb energy they are able to move from their ground states up to excited states. The answer is letter B. an example of this is when you light a match. The molecules of the matchstick are in its ground state. When you flick it on the ground or anything hard, it causes its molecules to move into the excited state and thus causing fire.
Answers
c. Diluted, and
d. soluble
Answers
the answer will be b)
2) 0.000023
3) 101,000
4) 0.010
5) 45.01
6) 1,000,000
7) 0.00671
8) 4.50
Answers
2.3 x 10^-5
1.01 x 10^5
1.0 x10^-2
4.5 x 10^1
1.0 x 10^6
6.71 x10^-3
450 x 10^-2
Final answer:
The question asked about converting normal numbers into scientific notation. The answer provided the eight scientific notation equivalents for each of the numbers provided in the question, explaining the process of calculating them.
Explanation:
To write numbers in scientific notation, we have to express them in the form of a x 10^n, where 1 <= a < 10 and n represents the number of places the decimal place has been moved. Let's proceed with each given number:
- 3.400 is already in the form. Hence, it is written as 3.4 x 10^0.
- To convert 0.000023 into scientific notation, move the decimal place 5 places to the right. So, this is 2.3 x 10^-5.
- 101,000 converts to 1.01 x 10^5.
- For 0.010, we move the decimal place 2 places to the right, giving 1.0 x 10^-2.
- 45.01 in scientific notation is 4.501 x 10^1.
- 1,000,000 becomes 1.0 x 10^6.
- To translate 0.00671 into scientific notation, you move the decimal place 3 places to the right, leaving 6.71 x 10^-3.
- Lastly, 4.50 remains as 4.5 x 10^0.
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