Recent activity by ErwinRettig0

1 answer 15 views

How can the surface properties of a polymer be modified to improve its adhesion to metal substrates?

asked 10 hours ago in Surface Chemistry

1 answer 41 views

Calculate the enthalpy of desorption of hydrogen gas (H2) from a platinum surface, given that the temperature of the surface is 298 K and the pressure of H2 gas above the surface is 1 atm. The adsorption enthalpy of H2 on Pt is -43300 J/mol. (Assume ideal gas behavior for H2.)

answered Jan 23 in ThermoChemistry

1 answer 56 views

Calculate the enthalpy change for the polymerization of polyethylene using the following information: ΔHf° of ethylene (-20.4 kJ/mol) and polyethylene (-1024 kJ/mol); the reaction equation: nC2H4 (g) → [-CH2-CH2-]n (s)

answered Jan 23 in ThermoChemistry

1 answer 40 views

What is the definition of social loafing?

answered Jan 20 in Psychology

1 answer 26 views

How can the principles of the social exchange theory be used in the workplace?

asked Jan 15 in Psychology

1 answer 22 views

What reaction means, literally, “splitting with water"?

asked Jan 7 in Science

1 answer 20 views

What is the common word for potential difference in a circuit?

asked Jan 6 in Science

1 answer 36 views

What are fresh water biomes defined by?

answered Jan 2 in Science

1 answer 12 views

Sporangia produce spores that develop into tiny, heart-shaped what?

answered Dec 28, 2024 in Science

1 answer 11 views

What type of particles can a beta particle be?

answered Dec 27, 2024 in Science

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