Recent questions in Physical Chemistry

0 votes

1 answer 27 views

What is the change in enthalpy of a chemical reaction if 25 grams of methane gas (CH4) reacts with excess oxygen gas (O2) to produce carbon dioxide gas (CO2) and water vapor (H2O) at a constant pressure of 1 atm and a temperature of 298 Kelvin?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 62 views

What is the change in enthalpy (ΔH) for the combustion of propane (C3H8) at standard conditions, given that the heat of formation (ΔHf) for propane is -103.85 kJ/mol, and the combustion reaction is:C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O(l)

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 25 views

Using quantum mechanics, calculate the bond length and dissociation energy of the HCl molecule.

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 27 views

What is the amount of heat (in joules) required to raise the temperature of 125 grams of water from 25°C to its boiling point of 100°C? The specific heat capacity of water is 4.184 J/(g·°C) and the enthalpy of vaporization of water is 40.7 kJ/mol.

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 28 views

What is the amount of heat released when burning 5.00 grams of methane (CH4) in excess oxygen under standard conditions?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 38 views

What is the amount of heat absorbed by a 50 g sample of water when it is heated from 20°C to 100°C? (Specific heat of water= 4.18 J/g·K)

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 35 views

How can we accurately predict the behavior and properties of a particular molecule using computational methods, and what are the potential applications of this information in fields such as drug design and materials science?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 36 views

What are the factors affecting the adsorption of gases on solid surfaces and how can we experimentally determine the surface area of adsorbents such as activated carbon?

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 32 views

How does the wavelength of light affect the rate of a photochemical reaction? Provide a detailed experimental design to investigate this relationship, including the necessary equipment and reagents needed.

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 49 views

How does the wavelength of light affect the rate of a photochemical reaction in a particular sample? Is it possible to increase the rate of the reaction by optimizing the wavelength of light used? If so, how?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 28 views

How does the wavelength of incident light affect the rate of electron transfer in a photochemical reaction between a metal complex and a sacrificial electron donor?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 36 views

How does the viscosity of ionic liquids change with the length of their alkyl chains?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 27 views

How does the molar mass and size of the anion affect the viscosity of ionic liquids?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 35 views

What is the effect of temperature on the viscosity of ionic liquids?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 33 views

What is the effect of temperature on the viscosity of common ionic liquids used in industrial processes?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 36 views

How does the viscosity of an ionic liquid change with temperature and composition?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 35 views

What is the vibrational frequency of the C-H bonds in methane and how does it relate to the wavelength of the radiation absorbed during infrared spectroscopy?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 29 views

What is the vibrational frequency of carbon dioxide (CO2) molecule in wavenumbers, and how does this frequency change when the molecule is exposed to a different temperature or pressure?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 44 views

What are the vibrational frequencies of a CO molecule and a CO2 molecule, and how can those frequencies be identified experimentally using vibrational spectroscopy techniques?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

0 votes

1 answer 35 views

How does the use of different catalysts affect the rate of a specific catalytic reaction, such as the decomposition of hydrogen peroxide, and how can this be measured experimentally?

asked Feb 28 in Physical Chemistry by TheScientist (138k points)

Recent questions in Physical Chemistry

Categories