Recent questions without a selected answer

0 votes

1 answer 41 views

Determine the standard enthalpy change of the dissolution reaction of 2.50 g of NaOH in water, given that the molar enthalpy of hydration of Na+ and OH- ions are -406.8 kJ/mol and -230.0 kJ/mol respectively. The heat capacity of the calorimeter is 25.2 J/°C and the initial and final temperatures were 24.0°C and 29.2°C respectively.

asked Feb 4 in Chemical thermodynamics by YDIPedro362 (330 points)

0 votes

1 answer 41 views

Determine the standard enthalpy change for the vaporization of 50g of ethyl alcohol (C2H5OH) at its normal boiling point of 78.4°C. Given that the molar heat of vaporization of ethyl alcohol is 38.56 kJ/mol and the molar mass of ethyl alcohol is 46.07 g/mol.

asked Feb 4 in Chemical thermodynamics by KristinaRubi (550 points)

0 votes

1 answer 42 views

Determine the standard enthalpy change for the reaction: Fe2O3 (s) + 3CO (g) → 2Fe (s) + 3CO2 (g)given the following values of standard enthalpy of formation:ΔHf° [Fe2O3 (s)] = -824 kJ/mol ΔHf° [CO2 (g)] = -393.5 kJ/mol ΔHf° [CO (g)] = -110.5 kJ/mol ΔHf° [Fe (s)] = 0 kJ/mol

asked Feb 4 in Chemical thermodynamics by SherylHighsm (450 points)

0 votes

1 answer 47 views

Determine the standard enthalpy change for the reaction between calcium oxide and hydrochloric acid, given the following information:CaO(s) + 2HCl(aq) → CaCl2(aq) + H2O(l)∆Hf° CaCl2(aq) = -795.7 kJ/mol∆Hf° H2O(l) = -285.8 kJ/mol∆Hc° = -1922.6 kJ/mol

asked Feb 4 in Chemical thermodynamics by SolCamarillo (330 points)

0 votes

1 answer 46 views

Determine the standard enthalpy change for the precipitation reaction of 10.0 g of calcium chloride (CaCl2) with excess sodium carbonate (Na2CO3) to form calcium carbonate (CaCO3) and sodium chloride (NaCl). Given the following standard enthalpies of formation: ΔHf°(CaCl2) = -795.8 kJ/mol, ΔHf°(Na2CO3) = -1130.1 kJ/mol, ΔHf°(CaCO3) = -1206.9 kJ/mol, and ΔHf°(NaCl) = -411.2 kJ/mol.

asked Feb 4 in Chemical thermodynamics by MarianneOFly (350 points)

0 votes

1 answer 30 views

Determine the standard enthalpy change for the precipitation reaction between aqueous solutions of silver nitrate (AgNO3) and potassium chloride (KCl), given the molar concentrations of AgNO3 and KCl are 0.10 M and 0.20 M, respectively. The balanced chemical equation for the reaction is:AgNO3(aq) + KCl(aq) -> AgCl(s) + KNO3(aq)The enthalpies of formation for AgNO3(aq), KCl(aq), AgCl(s), and KNO3(aq) are -365.6 kJ/mol, -436.0 kJ/mol, -127.0 kJ/mol, and -494.6 kJ/mol, respectively.

asked Feb 4 in Chemical thermodynamics by GingerCourts (410 points)

0 votes

1 answer 42 views

Determine the standard enthalpy change for the formation of water (H2O) when hydrogen gas (H2) reacts with oxygen gas (O2) according to the balanced equation:2H2(g) + O2(g) → 2H2O(l)Given that the standard enthalpy change of formation for H2O(l) is -285.8 kJ/mol, calculate the amount of heat absorbed or released when 4.50 moles of H2O(l) is formed under standard conditions.

asked Feb 4 in Chemical thermodynamics by MeaganJaspri (490 points)

0 votes

1 answer 41 views

Determine the standard enthalpy change for the formation of methane gas (CH4) from its constituent elements (C and H2) given the following standard enthalpy of formation values: ΔHf°(C) = 0 kJ/mol and ΔHf°(H2) = 0 kJ/mol.

asked Feb 4 in Chemical thermodynamics by StellaClyne2 (330 points)

0 votes

1 answer 36 views

Determine the standard enthalpy change for the following reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Given:ΔHf°[Fe2O3(s)] = -824.2 kJ/mol ΔHf°[CO(g)] = -110.5 kJ/mol ΔHf°[Fe(s)] = 0 kJ/mol ΔHf°[CO2(g)] = -393.5 kJ/mol

asked Feb 4 in Chemical thermodynamics by ToddMcdowell (390 points)

0 votes

1 answer 24 views

Determine the standard enthalpy change for the following reaction: 2 Fe (s) + 3/2 O2 (g) → Fe2O3 (s) Given the following data: - ΔHf° of Fe2O3 (s) = -826 kJ/mol - ΔHf° of O2 (g) = 0 kJ/mol - The heat capacity of the calorimeter is 135 J/°C Assume that the reaction takes place at constant pressure and that the heat absorbed by the calorimeter is negligible.

asked Feb 4 in Chemical thermodynamics by MollieMaddox (270 points)

0 votes

1 answer 37 views

Determine the standard enthalpy change for the dissolution of 5.00 grams of magnesium chloride in water, given that the molar mass of MgCl2 is 95.21 g/mol and the standard enthalpy change of formation for magnesium chloride is -641.3 kJ/mol.

asked Feb 4 in Chemical thermodynamics by KerstinFidle (330 points)

0 votes

1 answer 34 views

Determine the standard electrode potential, given that the standard reduction potential for the half-reaction, Ag+ (aq) + e- → Ag(s) is +0.80 V and the standard oxidation potential for the half-reaction, Fe(s) → Fe2+(aq) + 2e-, is -0.44 V. Using this information, predict whether or not the reaction Ag(s) + Fe2+(aq) → Fe(s) + Ag+(aq) will occur spontaneously under standard conditions.

asked Feb 4 in Chemical thermodynamics by KourtneyGold (450 points)

0 votes

1 answer 30 views

Determine the rate law for the reaction of nitrogen dioxide with hydrogen gas, if the reaction rate is directly proportional to the concentration of nitrogen dioxide and the square of the concentration of hydrogen gas. Express the rate law in terms of the rate constant and the concentrations of the reactants.

asked Feb 4 in Chemical kinetics by YongWhitis24 (410 points)

0 votes

1 answer 39 views

Determine the possible isomers of C3H8O using structural formulas and name the type of isomerism for each.

asked Feb 4 in Chemical bonding by EmersonGibbs (310 points)

0 votes

1 answer 42 views

Determine the polarity of the H-Cl bond in hydrogen chloride molecule, given the electronegativity values of hydrogen and chlorine to be 2.2 and 3.0, respectively.

asked Feb 4 in Chemical bonding by WileyTedesco (270 points)

0 votes

1 answer 38 views

Determine the oxidation state of the following elements in the compound potassium permanganate (KMnO4): a) Potassium b) Manganese c) Oxygen

asked Feb 4 in ElectroChemistry by NatishaBurba (250 points)

0 votes

1 answer 37 views

Determine the oxidation state of the chromium atom in the compound potassium dichromate (K2Cr2O7).

asked Feb 4 in Inorganic Chemistry by Miles73G157 (330 points)

0 votes

1 answer 40 views

Determine the oxidation state of the carbon atom in the molecule C2H5OH.

asked Feb 4 in Chemical reactions by RuthRoche423 (390 points)

0 votes

1 answer 39 views

Determine the oxidation state of sulfur in sodium sulfite (Na2SO3) using the oxidation state rules and justify your answer with proper explanation.

asked Feb 4 in ElectroChemistry by ColemanChart (590 points)

0 votes

1 answer 47 views

Determine the oxidation state of sulfur in H2SO4.

asked Feb 4 in Chemical reactions by ToshaLinthic (310 points)

Recent questions without a selected answer

Categories