Homework Answers
Definition: The chemical reaction which produces one mole of a substance from its constituent elements which are in their standard states is called a formation reaction. Note: The standard states mean that some of the elements exist as a diatomic molecule at normal room temperature.
1. The reaction of HCl and NaOH is not a proper formation reaction, because the substance is produced from two other compounds, not its elements.
2. The reaction of 2Mg and O2 is not a formation reaction because the two moles of MgO is formed.
3. The reaction of CaO and H2O is also not the case of formation reaction because of one mole of Ca(OH)2 is formed from two other compounds, not its elements.
4. The reaction of S and 3F2 is the perfect example of formation reaction because in this case one mole of an SF6 is produced from its elements in their standard states.
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Which of the following shows a formation reaction? States are omitted for simplicity. Assume all substances...
2. Determine which of these reaction(s) are redox reaction. 6 Li2O(s) + P4010(g) → 4 Li3PO4(s...
2. Determine which of these reaction(s) are redox reaction. 6 Li2O(s) + P4010(g) → 4 Li3PO4(s Cao(s) + H2O(1) + Ca(OH)2(s) s(s) + 3 F2(g) → SF6(g) Zns(s) + 2 O2(g) → ZnSO4(s) SO2(g) + Cl2(g) → SO2Cl2(g) CuSO4.5H20(s) → CuSO4(s) + 5 H2O(g) SnCl4•6H2O(s) → SnOz(s) + 4 HCl(8) + 4 H20(8) NH4NO2(s) → N2(g) + 2 H2O(g) (NH4)2Cr207(s) → N2(g) + Cr2O3(s) + 4 H2O(g) 2 Na(s) + Cl2(g) → 2 NaCl(s) SO3(g) + Cao(s) > CaSO4(s) SO2(g)...
A.Using standard heats of formation, calculate the standard enthalpy change for the following reaction. N2(g) +...
A.Using standard heats of formation, calculate the standard enthalpy change for the following reaction. N2(g) + 3H2(g) = 2NH3(g) B.Using standard heats of formation, calculate the standard enthalpy change for the following reaction. CaCO3(s) = CaO(s) + CO2(g) C. A scientist measures the standard enthalpy change for the following reaction to be -2910.6 kJ: 2C2H6(g) + 7 O2(g) = 4CO2(g) + 6 H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy...
d) Based on the following chemical equation, answer the following questions. H2S (g) + O2(g) 28...
d) Based on the following chemical equation, answer the following questions. H2S (g) + O2(g) 28 (g) + 2H20 (g) What happens to i) [H20] if O2 is added. ii) [H2S] if sulfur is added. (2 marks) e) Explain if the volume of the reaction vessel should be increased or decreased to increase the yields of the products. (i) CaCO3 (5) - - CaO(s) + CO2 (g) (ii) S(s) + 3F2 (g) SF6 (g) (2 marks) 1) Specify how and...
The following table lists some enthalpy of formation values for selected substances. Substance ΔfH∘ΔfH∘ (kJ mol−1)(kJ...
The following table lists some enthalpy of formation values for selected substances. Substance ΔfH∘ΔfH∘ (kJ mol−1)(kJ mol−1) CO2(g)CO2(g) −393.5−393.5 Ca(OH)2(s)Ca(OH)2(s) −986.1−986.1 H2O(l)H2O(l) −285.8−285.8 CaCO3(s)CaCO3(s) −1207−1207 H2O(g)H2O(g) −241.8−241.8 Part A: Determine the enthalpy for this reaction: Ca(OH)2(s)+CO2(g)→CaCO3(s)+H2O(l) C a ( O H ) 2 ( s ) + C O 2 ( g ) → C a C O 3 ( s ) + H 2 O ( l ) Express your answer in kJ mol−1 k J m o l...
A scientist measures the standard enthalpy change for the following reaction to be -2847.0 kJ: 2C2H6(g)...
A scientist measures the standard enthalpy change for the following reaction to be -2847.0 kJ: 2C2H6(g) + 7 02(g) —4CO2(g) + 6H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CzH6(g) is kJ/mol. A scientist measures the standard enthalpy change for the following reaction to be -15.0 kJ : Ca(OH)2(aq) + 2 HCl(aq) +CaCl(s) + 2 H20(1) Based on this value and the standard enthalpies of formation for...
E 21 (1 Point) Which of the following represent the reaction between MgO and H2O? a)...
E 21 (1 Point) Which of the following represent the reaction between MgO and H2O? a) 2MgO + H20 → 2MgOH + 12 02 b) MgO + H2O + Mg(OH)2 MgO + H2O → Mg + H2O2 d) MgO + H2O → MgH2 + O2 А Св
1) The net ionic equation for the reaction between aqueous nitric acid and aqueous sodium hydroxide...
1) The net ionic equation for the reaction between aqueous nitric acid and aqueous sodium hydroxide is A) H+ (aq) + HNO3 (aq) + 2OH- (aq) → 2H20 (1) + NO3- (aq) B) HNO3 (aq) + NaOH(aq) → NaNO3(aq) + H20 (1) C) H+ (aq) + OH- (aq) + H2O (1) D) HNO3 (aq) + OH- (aq) + NO3- (aq) + H2O (1) E) H+ (aq) + Na+ (aq) + OH- (aq) → H20 (1) + Na+ (aq) 2) Which...
Which of the following is not a formation reaction? 1/2H2(g) + 1/2 Brale) > HBr(g) H2(g)...
Which of the following is not a formation reaction? 1/2H2(g) + 1/2 Brale) > HBr(g) H2(g) + 1/2O2(g) → H20(4) Ca(s) + 1/2O2(g) → Cao(s) • 4Al(s) + 3/202(g) → Al2O3(s) H2O(l) +SO3(l) → H2SO4()
need help with these 2 please asap Which of the following reactions is a non-redox reaction?...
need help with these 2 please asap
Which of the following reactions is a non-redox reaction? O 2 H, 02H2 + O2 O2KCIO3 -- 2KCI + 3 02 o CaO + H2O = Ca(OH)2 O 2 SO2 + 02 - 2 SO, Question 42 2 pts Which substance functions as a oxidizing agent in the following redox reaction? CH4 + 20 C0, + 2H2O H20 CO2 CHA
lowing double displacement reaction equations (assume all reac- and balance the following cumplete and as go...
lowing double displacement reaction equations (assume all reac- and balance the following cumplete and as go to products). Agel & Na NO OB NaCl + AgNO₃ - BaCl2 + H2SO, — NaOH + HCl - Na,Cog + HCI HgSO4 + NH4OH FeCl, + NH,OH — Na2SO3 + HCI — K,Cro, + Pb(NO3), — NaC,H,O2 + HCl — NaOH + NH.NO пояс BiClg + H2S 12. K.C,0+ HCI — HAPO, + Ca(OH)2 - HNO (NH) CO + NiBr, K.CO2 +
2. Determine which of these reaction(s) are redox reaction. 6 Li2O(s) + P4010(g) → 4 Li3PO4(s Cao(s) + H2O(1) + Ca(OH)2(s) s(s) + 3 F2(g) → SF6(g) Zns(s) + 2 O2(g) → ZnSO4(s) SO2(g) + Cl2(g) → SO2Cl2(g) CuSO4.5H20(s) → CuSO4(s) + 5 H2O(g) SnCl4•6H2O(s) → SnOz(s) + 4 HCl(8) + 4 H20(8) NH4NO2(s) → N2(g) + 2 H2O(g) (NH4)2Cr207(s) → N2(g) + Cr2O3(s) + 4 H2O(g) 2 Na(s) + Cl2(g) → 2 NaCl(s) SO3(g) + Cao(s) > CaSO4(s) SO2(g)...
d) Based on the following chemical equation, answer the following questions. H2S (g) + O2(g) 28 (g) + 2H20 (g) What happens to i) [H20] if O2 is added. ii) [H2S] if sulfur is added. (2 marks) e) Explain if the volume of the reaction vessel should be increased or decreased to increase the yields of the products. (i) CaCO3 (5) - - CaO(s) + CO2 (g) (ii) S(s) + 3F2 (g) SF6 (g) (2 marks) 1) Specify how and...
A scientist measures the standard enthalpy change for the following reaction to be -2847.0 kJ: 2C2H6(g) + 7 02(g) —4CO2(g) + 6H2O(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of CzH6(g) is kJ/mol. A scientist measures the standard enthalpy change for the following reaction to be -15.0 kJ : Ca(OH)2(aq) + 2 HCl(aq) +CaCl(s) + 2 H20(1) Based on this value and the standard enthalpies of formation for...
E 21 (1 Point) Which of the following represent the reaction between MgO and H2O? a) 2MgO + H20 → 2MgOH + 12 02 b) MgO + H2O + Mg(OH)2 MgO + H2O → Mg + H2O2 d) MgO + H2O → MgH2 + O2 А Св
1) The net ionic equation for the reaction between aqueous nitric acid and aqueous sodium hydroxide is A) H+ (aq) + HNO3 (aq) + 2OH- (aq) → 2H20 (1) + NO3- (aq) B) HNO3 (aq) + NaOH(aq) → NaNO3(aq) + H20 (1) C) H+ (aq) + OH- (aq) + H2O (1) D) HNO3 (aq) + OH- (aq) + NO3- (aq) + H2O (1) E) H+ (aq) + Na+ (aq) + OH- (aq) → H20 (1) + Na+ (aq) 2) Which...
Which of the following is not a formation reaction? 1/2H2(g) + 1/2 Brale) > HBr(g) H2(g) + 1/2O2(g) → H20(4) Ca(s) + 1/2O2(g) → Cao(s) • 4Al(s) + 3/202(g) → Al2O3(s) H2O(l) +SO3(l) → H2SO4()
need help with these 2 please asap
Which of the following reactions is a non-redox reaction? O 2 H, 02H2 + O2 O2KCIO3 -- 2KCI + 3 02 o CaO + H2O = Ca(OH)2 O 2 SO2 + 02 - 2 SO, Question 42 2 pts Which substance functions as a oxidizing agent in the following redox reaction? CH4 + 20 C0, + 2H2O H20 CO2 CHA
lowing double displacement reaction equations (assume all reac- and balance the following cumplete and as go to products). Agel & Na NO OB NaCl + AgNO₃ - BaCl2 + H2SO, — NaOH + HCl - Na,Cog + HCI HgSO4 + NH4OH FeCl, + NH,OH — Na2SO3 + HCI — K,Cro, + Pb(NO3), — NaC,H,O2 + HCl — NaOH + NH.NO пояс BiClg + H2S 12. K.C,0+ HCI — HAPO, + Ca(OH)2 - HNO (NH) CO + NiBr, K.CO2 +
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