Recent activity by FredAfford68

1 answer 36 views

Design a heat exchanger for a specific process that involves heating a liquid from 20°C to 60°C. The liquid has a flow rate of 500 L/hr, and it will be heated by steam at a pressure of 3 bar. The heat transfer coefficient for the steam is 3000 W/(m²·K), and the overall heat transfer coefficient for the heat exchanger is 500 W/(m²·K). Determine the surface area required for the heat exchanger and the flow rate of steam required to heat the liquid.

asked 1 day ago in Chemical engineering

1 answer 4 views

Calculate the standard enthalpy change for the reaction in which 6 moles of calcium oxide reacts with 3 moles of carbon dioxide to produce 2 moles of calcium carbonate. The equation for the reaction is:CaO(s) + CO2(g) → CaCO3(s)Given the standard enthalpy of formation values: ΔHf°[CaO(s)] = -635.09 kJ/mol, ΔHf°[CO2(g)] = -393.51 kJ/mol, and ΔHf°[CaCO3(s)] = -1207.44 kJ/mol.

answered 2 days ago in Chemical thermodynamics

1 answer 37 views

Calculate the standard enthalpy change (ΔH°) for the reaction of combustion of 1 mole of ethanol (C2H5OH) given that the standard enthalpy of formation (ΔH°f) for ethanol and carbon dioxide (CO2) are -277.7 kJ/mol and -393.5 kJ/mol respectively, and the standard enthalpy of formation (ΔH°f) for water (H2O) is -285.8 kJ/mol. The balanced chemical equation for the reaction is as follows:C2H5OH (l) + 3 O2 (g) → 2 CO2 (g) + 3 H2O (l)

answered 2 days ago in Chemical thermodynamics

1 answer 42 views

What are the steps involved in balancing a chemical equation, and can you provide an example of a balanced equation?

answered 5 days ago in Chemical education

1 answer 51 views

Identify the type of isomerism exhibited by the compounds 2-butene and 1-butene, and compare their physical and chemical properties in detail to explain why the two compounds differ in their reactivity towards addition reactions with hydrogen.

asked 6 days ago in Organic Chemistry

1 answer 49 views

Calculate the heat of hydration of MgSO4·7H2O if the enthalpy change for dissolving 1 mol of MgSO4 in water is -26.83 kJ/mol, and the enthalpy change for hydrating 1 mol of MgSO4·7H2O with 7 moles of water is -233.80 kJ/mol.

answered Jan 23 in ThermoChemistry

1 answer 22 views

When might older adults experience 'ego integrity'?

asked Jan 17 in Psychology

1 answer 17 views

What is the difference between objective and interpretative accounts?

asked Jan 16 in Psychology

1 answer 50 views

What is the criticism of ecological psychology?

answered Jan 16 in Psychology

1 answer 19 views

How can gratitude interventions improve wellbeing?

answered Jan 15 in Psychology

1 answer 36 views

Why is cognitive architecture useful?

asked Jan 15 in Psychology

1 answer 28 views

When did psychology officially become a field of study?

asked Jan 14 in Psychology

1 answer 19 views

What is the impact of social media on adolescent development?

asked Jan 14 in Psychology

1 answer 25 views

What is drive theory, and how does it relate to psychoanalysis?

asked Jan 13 in Psychology

1 answer 22 views

While components of a mixture can be separated by physical means, the components of a pure substance can only be broken down through what means?

answered Jan 8 in Science

1 answer 35 views

What kind of diagrams can be used to illustrate electron movements and ion formation?

answered Jan 7 in Science

1 answer 19 views

What is the tough tissue that contains collagen?

answered Jan 7 in Science

1 answer 9 views

High levels of radiation can remove electrons from?

answered Dec 30, 2024 in Science

1 answer 28 views

Catabolic and anabolic hormones in the body help regulate these?

asked Dec 30, 2024 in Science

1 answer 21 views

A tropism where light is the stimulus is known as what?

asked Dec 30, 2024 in Science

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