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Calculate the standard enthalpy change for the dissolution of 10 grams of potassium hydroxide (KOH) in 100 mL of water. Given that the molar enthalpy of dissolution of solid KOH is -57.61 kJ/mol and the density of water is 1 g/mL.

asked Feb 3 in Chemical thermodynamics

1 answer 63 views

How can a chemistry student improve their understanding of complex chemical concepts?

asked Jan 30 in Chemical education

1 answer 52 views

Calculate the enthalpy of formation of So₃(g) using the given thermochemical equations:2SO₂(g) + O₂(g) → 2SO₃(g) ∆H = -197 kJ/mol2SO₂(g) + 2O₂(g) → 2SO₃(g) ∆H = -792 kJ/mol

answered Jan 23 in ThermoChemistry

1 answer 53 views

Calculate the corrosion potential for a pure iron (Fe) electrode in a 1 M HCl solution at 25°C, given that the standard reduction potential of Fe in acidic solution is -0.44 V.

asked Jan 23 in ElectroChemistry

1 answer 52 views

A laboratory assistant is asked to prepare a buffer solution with a pH of 7.10 using acetic acid (CH3COOH) and sodium acetate (NaCH3COO). If the laboratory assistant has 250 mL of 0.20 M acetic acid, how many grams of NaCH3COO will be needed to make the buffer solution?

asked Jan 22 in Chemical reactions

1 answer 21 views

What is object permanence?

answered Jan 20 in Psychology

1 answer 8 views

According to Bronfenbrenner's ecological systems theory, why do individuals need to be studied in their ecological context?

asked Jan 17 in Psychology

1 answer 24 views

What are the criticisms of cross-cultural psychology?

asked Jan 16 in Psychology

1 answer 37 views

How does community psychology differ from clinical psychology?

asked Jan 15 in Psychology

1 answer 39 views

What is the 'social robot' hypothesis?

answered Jan 14 in Psychology

1 answer 47 views

What type of invertebrates where the earliest animals?

answered Jan 8 in Science

1 answer 33 views

What property is the result of force acting on a given area?

answered Jan 7 in Science

1 answer 20 views

What force opposes a motion of a moving body? for example a car breaking on a road.

answered Jan 6 in Science

1 answer 27 views

What connection is required for a newborn baby to begin breathing?

asked Jan 6 in Science

1 answer 27 views

Many species use their body shape and coloration to avoid what?

asked Dec 31, 2024 in Science

1 answer 30 views

What phase of a human life does not have a definite starting point?

asked Dec 28, 2024 in Science

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