Recent activity by SadyeY715815

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How many kJ of heat are released when 2.5 g of octane undergo complete combustion according to the reaction:$$C_8H_{18} + 12.5 O_2 \rightarrow 8 CO_2 + 9 H_2O$$Given: Enthalpy of combustion of octane = -5,470 kJ/mol.

asked Feb 13 in ThermoChemistry

1 answer 37 views

Calculate the standard enthalpy change for the fusion reaction of a sodium atom. Given the enthalpy of formation of Na(g) is 107.3 kJ/mol and the enthalpy of fusion of Na(s) is 2.6 kJ/mol.

answered Feb 3 in Chemical thermodynamics

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What is the predicted bond strength of methane (CH4) using the concept of bond dissociation energy? Compare its bond strength with that of carbon monoxide (CO) and ammonia (NH3).

answered Jan 31 in Chemical bonding

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Calculate the Gibbs free energy change for the electrochemical reaction: Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) Given the standard reduction potentials: E°(Cu2+/Cu) = 0.34 V E°(Zn2+/Zn) = -0.76 V Assuming standard conditions of 1 M concentration and 1 atm pressure at 25°C.

answered Jan 23 in ElectroChemistry

1 answer 44 views

Calculate the enthalpy of adsorption for a reaction where 2 moles of nitrogen gas (N2) are adsorbed on the surface of a solid at -100°C. Given that the partial pressure of N2 in the gas phase is 0.2 atm and the equilibrium constant for adsorption of N2 at this temperature is 2.5 x 10^3. Assume the adsorption is a reversible process and that the ideal gas law can be used to calculate partial pressures.

answered Jan 23 in ThermoChemistry

1 answer 32 views

What is the impact of sleep on mental health?

asked Jan 20 in Psychology

1 answer 65 views

Who coined the term 'Gestalt'?

asked Jan 17 in Psychology

1 answer 46 views

Where does the enlightenment theory of human sexuality focus?

asked Jan 15 in Psychology

1 answer 38 views

What is theory development?

asked Jan 15 in Psychology

1 answer 35 views

What is the process of classical conditioning?

answered Jan 13 in Psychology

1 answer 42 views

When water is heated by magma and makes it's way to the surface what is created?

asked Jan 8 in Science

1 answer 54 views

What is the name of the simplest carbon molecule?

answered Jan 7 in Science

1 answer 46 views

What is our largest source of energy?

answered Jan 6 in Science

1 answer 41 views

What effect, related to weather forecasting, occurs not only for sound but for any wave when there is relative motion between the observer and the source?

answered Jan 6 in Science

1 answer 32 views

What do fungi absorb to get their nutrition?

answered Jan 6 in Science

1 answer 54 views

Some isotopes are stable indefinitely, while others are radioactive and do what through a characteristic form of emission?

asked Dec 31, 2024 in Science

1 answer 35 views

Like other amphibians, frogs generally lay their eggs in moist environments, which are required since the eggs lack what feature?

answered Dec 31, 2024 in Science

1 answer 52 views

In grazing, a predator partially eats but does not kill what?

answered Dec 31, 2024 in Science

1 answer 26 views

How do they classify tornadoes?

asked Dec 30, 2024 in Science

1 answer 12 views

Do amphibians and reptiles maintain a constant body temperature?

asked Dec 30, 2024 in Science

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