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Morgarella [4.7K]
3 years ago
11

How much work (in J) is involved in a chemical reaction if the volume decreases from 5.35 to 1.55 L against a constant pressure

of 0.829 atm?
Chemistry
1 answer:
Mrac [35]3 years ago
5 0

Answer:- work = 319 J

Solution:- The volume of the gas decreases from 5.35 L to 1.55 L.

\Delta V=1.55L-5.35L  = -3.80 L

external pressure is given as 0.829 atm.

w=-P_e_x_t\Delta V

where w is representing work.

Let's plug in the values and calculate pressure-volume work:

w=-0.829atm(-3.80L)

w = 3.15 atm.L

We need to convert atm.L to J.

1 atm.L = 101.325 J

So, 3.15atm.L(\frac{101.325J}{1atm.L})

= 319 J

So, 319 J of work is involved in a chemical reaction. Positive work means the work is done on the system.

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Answer:

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For a certain chemical reaction, the standard Gibbs free energy of reaction at 30.0 °C is 110. kJ. Calculate the equlilibriunm c
mestny [16]

Answer:

Explanation:

The equation that relates standard Gibbs free energy, ΔG, with equilibrium constant, K, is:

ΔG = -RT ln K

<em>Where R is gas constant, 8.314J/molK, and T is absolute temperatue (30.0°C + 273.15 = 303.15K).</em>

<em />

Replacing (110kJ = 110000J):

110000J/mol = -8.314J/molK*303.15K ln K

-43.644 = lnK

1.11x10⁻¹⁹ = K

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4 0
2 years ago
Which of the following is the best piece of laboratory glassware for preparing 500.0 mL of an aqueous solution of a solid?
Leni [432]

Answer:

The correct answer is option A.

Explanation:

Volumetric flask  : A glass ware with round lower body with flat bottom and with thin cylindrical neck along with mark which indicates the specific volume filled to that mark.It is used in preparation of standard solution of compound with desired concentration with fixed volume.

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Graduated cylinder : Laboratory thin cylindrical glassware with accurate marking of volume used to measure an accurate volume of solutions or liquids required in an experiment.

<em><u>Volumetric flask</u></em> is the best piece of laboratory glassware for preparing 500.0 mL of an aqueous solution of a solid

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