Which of the following chemical equations corresponds to the standard molar enthalpy of formation (ΔH°f) for...
Which of the following chemical equations corresponds to the standard molar enthalpy of formation (ΔH°f) for Rb2SeO4?
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2 Rb(s) + Se (s) + 2 O2(g) → Rb2SeO4 (s) |
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2 Rb(s) + Se(s) + 4 O(g) → Rb2SeO4 (s) |
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2 Rb+(aq) + SeO42-(aq) → Rb2SeO4 (s) |
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2 Rb+(aq) + SeO42-(aq) → Rb2SeO4 (aq) |
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Which of the following
chemical equations corresponds to the standard molar enthalpy of
formation (ΔH°f) for...
The standard heat of formation, ΔH∘f, is defined as the enthalpy change for the formation of...
The standard heat of formation, ΔH∘f, is defined as the enthalpy change for the formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard states have ΔH∘f=0. Heat of formation values can be used to calculate the enthalpy change of any reaction. Consider, for example, the reaction 2NO(g)+O2(g)⇌2NO2(g) with heat of formation values given by the following table: Substance ΔH∘f (kJ/mol) NO(g) 90.2 O2(g) 0 NO2(g) 33.2 Then the standard heat...
The standard enthalpy of formation (ΔH∘f) is the enthalpy change that occurs when exactly 1 mol of a compound is formed...
The standard enthalpy of formation (ΔH∘f) is the enthalpy change that occurs when exactly 1 mol of a compound is formed from its constituent elements under standard conditions. The standard conditions are 1 atm pressure, a temperature of 25 ∘C , and all the species present at a concentration of 1 M . A "standard enthalpies of formation table" containing ΔH∘f values might look something like this: Substance ΔH∘f H(g) 218 kJ/mol H2(g) 0 kJ/mol Ba(s) 0 kJ/mol Ba2+(aq) −538.4...
Write a balanced chemical equation that corresponds to the standard molar enthalpy of formation of Na_2CO_3(s)?
Write a balanced chemical equation that corresponds to the standard molar enthalpy of formation of Na_2CO_3(s)?
Which of the following reactions corresponds to the thermochemical equation for the standard molar enthalpy of...
Which of the following reactions corresponds to the thermochemical equation for the standard molar enthalpy of formation of solid zinc nitrate? a. Zn(s) + 2N(g) + 6O(g) → Zn(NO3)2(s) b. Zn(s) + 2HNO3(aq) → Zn(NO3)2(s) + H2(g) c. Zn(OH)2(s) + 2HNO3(aq) → Zn(NO3)2(s) + 2H2O() d. Zn2+(aq) + 2NO3–(aq) → Zn(NO3)2(s) e. Zn(s) + N2(g) + 3O2(g) → Zn(NO3)2(s)
Calculate the standard enthalpy change, ΔH°rxn, in kJ for the following chemical equation, using only the...
Calculate the standard enthalpy change, ΔH°rxn, in kJ for the following chemical equation, using only the thermochemical equations below: CaCO3(s) → CaO(s) + CO2(g) Report your answer to three significant figures in scientific notation. Equations: ΔH°rxn (kJ) Ca(s) + CO2(g) + 1/2O2(g) → CaCO3(s) -812.5 2Ca(s) + O2(g) → 2CaO(s) -1270.3
Write the chemical equation for the reaction whose enthalpy change is the standard enthalpy of formation...
Write the chemical equation for the reaction whose enthalpy change is the standard enthalpy of formation of raffinose, C18H32O16(s), ΔH∘f[C18H32O16]. Express your answer as a chemical equation. Identify all of the phases in your answer.
Write the chemical equation for the reaction whose enthalpy change is the standard enthalpy of formation of raffinose, C...
Write the chemical equation for the reaction whose enthalpy change is the standard enthalpy of formation of raffinose, C18H32O16(s), ΔH∘f[C18H32O16]. Express your answer as a chemical equation. Identify all of the phases in your answer.
What is the standard enthalpy of formation of What is the standard enthalpy of formation of ...
What is the standard enthalpy of formation of What is the standard enthalpy of formation of CH 3 CH 2 CH 2 CHO(l)? CH3CH2CH2CHO(l)? 2CH 3 CH 2 CH 2 CHO(l)+5O 2 (g)→8H 2 O(l)+8CO 2 (g); 2CH3CH2CH2CHO(l)+5O2(g)→8H2O(l)+8CO2(g); ΔH°=–4943.6 kJ ΔH°=–4943.6 kJ Substance ΔH° f (kJ/mol) CO 2 (g) -393.5 H 2 O(l) –285.8 a. –245.4 kJ/mol b. +245.4 kJ/mol c. –1792.5 kJ/mol d. –3151.1 kJ/mol e. +3151.1 kJ/mol
Part A) What is ΔH∘rxn for the following chemical reaction? CO2(g)+2KOH(s)→H2O(g)+K2CO3(s) You can use the following...
Part A) What is ΔH∘rxn for the following chemical reaction? CO2(g)+2KOH(s)→H2O(g)+K2CO3(s) You can use the following table of standard heats of formation (ΔH∘f) to calculate the enthalpy of the given reaction. Element/ Compound Standard Heat of Formation (kJ/mol) Element/ Compound Standard Heat of Formation (kJ/mol) H(g) 218 N(g) 473 H2(g) 0 O2(g) 0 KOH(s) −424.7 O(g) 249 CO2(g) −393.5 K2CO3(s) −1150kJ C(g) 71 H2O(g) −241.8kJ C(s) 0 HNO3(aq) −206.6 Express the standard enthalpy of reaction to three significant figures and...
Calculate the standard enthalpy change, ΔH, for the formation of 1 mol of strontium carbonate (the...
Calculate the standard enthalpy change, ΔH, for the formation of 1 mol of strontium carbonate (the material that gives the red color in fireworks) from its elements. Sr(s) + C(graphite) + 32 O2(g) -----> SrCO3(s) The information available is: (1) Sr(s)+ 12O2(g) ---->SrO(s) DeltaH= -592kj (2) SrO(s) + CO2(g) -----> SrCO3(s) DeltaH= -234kj (3) C(graphite) + O2 (g) ----->CO2 (g) DeltaH= -394kl
Write a balanced chemical equation that corresponds to the standard molar enthalpy of formation of Na_2CO_3(s)?
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