Recent questions in Physical Chemistry

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

asked 6 days ago in Physical Chemistry by Mamie69P9842 (470 points)

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

asked 6 days ago in Physical Chemistry by JinaCurrey75 (590 points)

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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 6 days ago in Physical Chemistry by Normand57353 (590 points)

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

asked 6 days ago in Physical Chemistry by Jodi66242236 (410 points)

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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 6 days ago in Physical Chemistry by MiaTryon261 (390 points)

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

asked 6 days ago in Physical Chemistry by ClydeMcclure (550 points)

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

asked 6 days ago in Physical Chemistry by FelicitasJas (570 points)

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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 6 days ago in Physical Chemistry by LucileS35482 (450 points)

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

asked 6 days ago in Physical Chemistry by LouisZ84615 (390 points)

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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 6 days ago in Physical Chemistry by FrancescoCar (550 points)

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1 answer 53 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 ChelseyHenle (530 points)

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1 answer 41 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 ChesterNvu69 (710 points)

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1 answer 46 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 GusWestover (350 points)

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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 TillyLeach60 (390 points)

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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 JadeHellyer0 (530 points)

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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 JorjaIsbell (450 points)

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1 answer 54 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 TreyVanhorn (570 points)

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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 JaniceOliver (730 points)

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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 GDZWillis962 (390 points)

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Calculate the electrical double layer thickness of a silica particle with a radius of 50 nm, assuming the particle is in water at room temperature and has a surface charge density of -0.05 C/m².

asked Jan 23 in Physical Chemistry by NoraSneddon (650 points)

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