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Questions tagged 'Enthalpy'

15 questions

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Anonymous

Jan 24, 2025

Use the following data to calculate the enthalpy of hydration for calcium chloride and calcium iodide.?

Use the following data to calculate the enthalpy of hydration for calcium chloride (CaCl2) and calcium iodide (CaI2). The lattice energy for CaCl2 is -2247 kJ/mol, and the enthalpy of solution is -46...

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Anonymous

Jan 20, 2025

Using bond enthalpies, estimate ΔH for the following gas-phase reactions: Estimate delta H for reactions a, b and c.?

"Using bond enthalpies, estimate the change in enthalpy (ΔH) for the following gas-phase reactions. Please calculate ΔH for reactions (a), (b), and (c), providing a detailed explanation of your calcul...

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Anonymous

Jan 11, 2025

Consider this combination reaction: 2mg(s)+o2(g)→2mgo(s) δh=−1204 kj what is the enthalpy for the decomposition of 1 mole of

Consider the following combination reaction: 2 mg(s) + O2(g) → 2 MgO(s) with a ΔH of -1204 kJ. What is the enthalpy change for the decomposition of 1 mole of MgO(s) into Mg(s) and O2(g)?

calculate the enthalpy change for the neutralization please!!!?

In a coffee cup calorimeter, 100.0 mL of 1.0 M NaOH is mixed with 100.0 mL of 1.0 M HCl. Both solutions were initially at 24.6 °C. After the reaction, the final temperature is measured at 31.3 °C. Ass...

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Anonymous

Dec 17, 2024

The combustion of pentane, c5h12, occurs via the reaction c5h12(g)+8o2(g)→5co2(g)+6h2o(g) with heat of formation values given by

The combustion of pentane (C5H12) is represented by the following reaction: C5H12(g) + 8O2(g) → 5CO2(g) + 6H2O(g). To analyze this reaction further, we can consider the heat of formation values prov...

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Anonymous

Dec 12, 2024

What is the enthalpy of the reaction?

What is the enthalpy change of the reaction? Please calculate it using the formula ΔH_rxn = ΣΔH_f (products) - ΣΔH_f (reactants). The values are as follows: -1,839.6 kJ for the products and -1,179.8 k...

A process which is unfavorable with respect to enthalpy, but favorable with respect to entropy?

What is a process that is unfavorable in terms of enthalpy but favorable in terms of entropy? Can such a process occur at high temperatures but not at low temperatures, or could it occur at low temper...

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Anonymous

Nov 14, 2024

Consider an ionic compound, MX2, composed of generic metal M

Consider an ionic compound, denoted as MX2, which consists of a generic metal M and a generic gaseous halogen X. Given the following thermodynamic the enthalpy of formation of MX2 is ΔHf° = –957 kJ/m...

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Anonymous

Nov 14, 2024

The molar enthalpy of vaporization of hexane (CH14) is 28.9 kl/mol, and its normal boiling point is 68.73 C What is the vapor pressure

The molar enthalpy of vaporization of hexane (C6H14) is 28.9 kJ/mol, and its normal boiling point is 68.73 °C. What is the vapor pressure of hexane at 25 °C?