Recent questions in Physical Chemistry

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1 answer 98 views

How does adsorption of gas molecules on a solid surface change with temperature and what are the factors that affect the extent of adsorption?

asked Jan 31 in Physical Chemistry by ChastityHoll (1.8k points)

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1 answer 100 views

What is the bond angle and shape of the water molecule according to the principles of quantum mechanics and molecular structure?

asked Jan 30 in Physical Chemistry by SVNCarissa5 (1.8k points)

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1 answer 125 views

What is the bond angle between the hydrogen atoms in an ammonia molecule (NH3) according to the molecular orbital theory?

asked Jan 30 in Physical Chemistry by VonSissons9 (1.9k points)

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1 answer 113 views

What is the shape and orientation of a water molecule according to quantum mechanics, and how does this affect its intermolecular interactions with other water molecules?

asked Jan 30 in Physical Chemistry by DorisHoutz8 (2.0k points)

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1 answer 93 views

What is the bond angle between the hydrogen atoms in a water molecule according to quantum mechanics?

asked Jan 30 in Physical Chemistry by CaitlynTulab (1.2k points)

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1 answer 113 views

Design a supramolecular assembly using non-covalent interactions that could potentially be used for drug delivery and explain how it can be achieved through self-assembly techniques in physical chemistry.

asked Jan 30 in Physical Chemistry by FrancescaTor (2.0k points)

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1 answer 107 views

What is the phase diagram of water and how does it relate to various states of water, including liquid, solid, and gas?

asked Jan 30 in Physical Chemistry by SVNCarissa5 (1.8k points)

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1 answer 110 views

What is the phase diagram of water and how does pressure and temperature affect the phase transition between solid, liquid, and gas phases?

asked Jan 30 in Physical Chemistry by HaydenSpeigh (1.7k points)

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1 answer 72 views

What is the phase diagram for a substance with a triple point at 2 atm and 50°C, a critical point at 70 atm and 400°C, and a normal boiling point of 100°C? Calculate the boiling point at 1.2 atm pressure.

asked Jan 30 in Physical Chemistry by BarryEisenbe (2.3k points)

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1 answer 121 views

What is the structure of the molecule responsible for the peak at 1700 cm$^{-1}$ in the IR spectrum of a compound?

asked Jan 30 in Physical Chemistry by CharleyPrior (1.8k points)

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1 answer 98 views

What is the effect of catalyst on the activation energy and rate of a chemical reaction? Provide an example of a catalytic reaction and explain how the catalyst works to increase the rate of the reaction.

asked Jan 30 in Physical Chemistry by HGCAileen63 (2.2k points)

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1 answer 73 views

Calculate the melting point of a solution containing 20 g of benzoic acid (C6H5COOH) and 80 g of naphthalene (C10H8). The melting points of pure benzoic acid and naphthalene are 122.4 °C and 80.2 °C, respectively. The molal freezing point depression constant for naphthalene is 6.8°C/m.

asked Jan 23 in Physical Chemistry by PDQJenifer7 (2.0k points)

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1 answer 68 views

Calculate the melting point of a mixture of 1 mol of benzene and 2 mol of toluene, given that the pure components have melting points of 5.5 °C and -95.0 °C, respectively.

asked Jan 23 in Physical Chemistry by JanieCorso7 (1.9k points)

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1 answer 69 views

Calculate the irreversible work done by a gas expanding adiabatically from an initial volume of 1 L to a final volume of 5 L against a constant external pressure of 2 atm, assuming that the gas is initially at a temperature of 300 K and that its final temperature is 400 K.

asked Jan 23 in Physical Chemistry by AngeliaDewey (1.8k points)

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1 answer 63 views

Calculate the internal energy and entropy change for a gas that undergoes an isothermal expansion from 2.0 L to 3.0 L at a constant temperature of 300 K.

asked Jan 23 in Physical Chemistry by CletaF793120 (2.8k points)

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1 answer 80 views

Calculate the Gibbs free energy change at standard conditions for the following synthesis reaction: CO2 (g) + 2H2 (g) → CH3OH (g)

asked Jan 23 in Physical Chemistry by PhillipPugli (2.1k points)

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1 answer 92 views

Calculate the equilibrium constant, Kc, for the reaction below at 25°C, if the concentration of CO2 is 0.10 M, the concentration of H2 is 0.20 M, and the concentration of CO is 0.30 M.CO2(g) + H2(g) ⇌ CO(g) + H2O(g)

asked Jan 23 in Physical Chemistry by MichelleHall (2.0k points)

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1 answer 81 views

Calculate the entropy change when one mole of helium gas is compressed isothermally at 298 K from a volume of 10 L to 2 L. The heat capacity of helium at constant pressure, Cₚ, is 20.8 J/mol*K.

asked Jan 23 in Physical Chemistry by ChanteStroh (1.5k points)

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1 answer 65 views

Calculate the entropy change of an ideal monatomic gas at 1 atm and 300 K when it expands isothermally to 5 times its initial volume.

asked Jan 23 in Physical Chemistry by Shawn33B4717 (1.9k points)

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1 answer 82 views

Calculate the entropy change (∆S) when a container of volume 1.0 L is filled with 1.0 mol of ideal gas at a temperature of 300 K and a pressure of 1.0 atm, and then the gas is allowed to expand irreversibly to fill a volume of 2.0 L against a constant external pressure of 0.5 atm at the same temperature.

asked Jan 23 in Physical Chemistry by ChloeBodnar (2.0k points)

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