Recent activity by SusieOrourke

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Here's a problem for you to solve:What is the enthalpy change (∆H) for the combustion of methane (CH4) to form carbon dioxide (CO2) and water (H2O) based on the following information?CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) ∆H = -890.4 kJ/molYou have a sample of methane and you want to determine the heat released or absorbed during combustion. How much heat is produced when you burn 5.00 grams of methane (CH4) at a constant pressure of 1 atm, assuming that the products are carbon dioxide (CO2) and water (H2O) and that the heat capacity of the calorimeter is negligible?

answered 6 days ago in Physical Chemistry

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Calculate the heat of hydration for the compound sodium sulfate (Na2SO4) given that 3 moles of water are released when 1 mole of the compound dissolves in water. The enthalpy of solution for sodium sulfate is -138 kJ/mol, and the enthalpy of hydration for water is -286 kJ/mol.

answered Jan 23 in ThermoChemistry

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What is an example of the principle of closure?

asked Jan 14 in Psychology

1 answer 44 views

When does sublimation occur?

answered Jan 8 in Science

1 answer 9 views

What type of cell transmits electrical impulses in the nervous system?

answered Jan 8 in Science

1 answer 47 views

What organisms use cilia, pseudopods, or flagella to move?

answered Jan 7 in Science

1 answer 31 views

What does the presence of gill slits suggest about humans and fish?

answered Jan 6 in Science

1 answer 26 views

What do you call a close relationship between two species that benefits both?

answered Jan 6 in Science

1 answer 62 views

The lithosphere-asthensophere divisions are based on what?

answered Jan 2 in Science

1 answer 12 views

Parasitism, mutualism, and commensalism are all examples of what type of biological relationship?

asked Dec 27, 2024 in Science

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