Recent activity by Margarita30G

1 answer 25 views

Calculate the standard enthalpy change for the reaction that occurs when 50 grams of ice at -10°C is heated to water at 25°C. The molar enthalpy of fusion of ice is 6.01 kJ/mol, and the specific heat capacity of water and ice are 4.184 J/g°C and 2.09 J/g°C, respectively. (Assume that the entire sample of ice is converted to water and that no heat is lost to the surroundings.)

answered 2 days ago in Chemical thermodynamics

1 answer 22 views

How does changing the pressure of a reaction between hydrogen gas and iodine gas affect the rate of reaction, and how can this relationship be explained by collision theory?

asked 2 days ago in Chemical kinetics

1 answer 38 views

Calculate the heat of formation of carbon dioxide gas (CO2) given the following bond energies: C=O bond energy is 799 kJ/mol and C-O bond energy is 358 kJ/mol.

asked Jan 23 in Chemical bonding

1 answer 47 views

Calculate the corrosion potential of copper in a galvanic couple with a standard hydrogen electrode at 298 K, given that the standard electrode potential of copper is +0.34 V and the standard electrode potential of hydrogen is 0 V.

asked Jan 23 in ElectroChemistry

1 answer 45 views

A chemical mixture containing 30% ethanol and 70% water needs to be separated using a distillation column. The feed rate is 1000 kg/hr and the desired purity for both products is 99%. The distillation column has 20 theoretical trays, and the reflux ratio is 2.5. Determine the number of trays required to achieve the desired purity for both products.

asked Jan 22 in Chemical engineering

1 answer 44 views

A 0.50 L vessel contains 1.0 mol of N2(g) and 3.0 mol of H2(g) at equilibrium at 400 K according to the following equation:N2(g) + 3H2(g) ⇌ 2NH3(g)If the volume of the vessel is suddenly decreased to 0.25 L, what will happen to the equilibrium position? Will the concentration of NH3 increase or decrease? Calculate the new equilibrium constant at this new volume.

asked Jan 22 in Chemical equilibrium

1 answer 46 views

What is hypothesis testing in cognitive development?

answered Jan 17 in Psychology

1 answer 6 views

Why is it important to consider the ethical implications of psychological research?

answered Jan 16 in Psychology

1 answer 5 views

Why is it important to consider comorbidity when evaluating eating disorders?

asked Jan 16 in Psychology

1 answer 30 views

What are some practical applications of metapsychology?

asked Jan 16 in Psychology

1 answer 19 views

When evaluating the theories of attribution, what is the actor-observer bias?

answered Jan 16 in Psychology

1 answer 58 views

Who proposed the social learning theory of personality?

asked Jan 16 in Psychology

1 answer 20 views

What is the biopsychosocial theory?

answered Jan 15 in Psychology

1 answer 30 views

What is the basic characteristic of monoprotic bases?

answered Jan 6 in Science

1 answer 31 views

Transport of nutrients and regulation of body temperature through fluid flow are characteristics of which bodily system?

asked Jan 2 in Science

1 answer 19 views

Transparent, translucent, or opaque are properties of matter based on an interaction with what?

asked Jan 2 in Science

1 answer 19 views

If hot water becomes trapped, pressure may build up. when the water breaks free, it creates what?

asked Dec 30, 2024 in Science

1 answer 17 views

The force that blood exerts upon the walls of the blood vessels or upon the chambers of the heart is known as blood what?

asked Dec 27, 2024 in Science

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