Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question
Calculate ΔH° for the reaction:
2HNO3(l) → N2O5(g) + H2O(l)
Group of answer choices
+6.7 kJ/mole
+73.7 kJ/mole
-140.6 kJ/mole
-73.7 kJ/mole
-100.4 kJ/mole
+140.6 kJ/mole
+100.4 kJ/mole
-6.7 kJ/mole
Expert Solution
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Step 1
The question is based on the concept of chemical thermodynamics.
enthalpy change for the reaction can be calculated as subtracting summation of enthalpies of Reactant from summation of enthalpies of products
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- CaCOg(s) -> CaO(s) +CO2 AH=177.8 kJ/mol What is the change in the internal energy for the reaction if 117-gram of CaCOg(s) is decomposed into CaO(s) and that CO2(g) produced was compressed from 4.1 L to 3.5 L with a pressure of 16.3 atm? Note: For heat, use the amount of heat absorbed in the reaction.arrow_forwardCalculate the total enthalpy change (kJ) for the following reaction: H2O (s, 90 g, –10. oC) --> H2O (l, 90 g, 10. oC) (The specific heat capacity of ice is 2.0 J/g×oC; the specific heat capacity of liquid water is 4.2 J/g×oC; the enthalpy of fusion for H2O at 0 oC is 6.0 kJ/mol.)arrow_forwardMISSED THIS? Read Section 19.8 (Pages 871 - 877); Watch IWE 19.6. Liquid methanol burns in oxygen to form gaseous carbon dioxide and gaseous water. Substance H° (kJ/mol) S° (J/(mol. K)) CH3OH (1) -238.6 126.8 O2 (g) 0 CO₂ (g) -393.5 CO2(aq) -413.8 H₂O(g) -241.8 H₂O(1) -187.8 205.2 213.8 117.6 188.8 70.0 stan 1 Periodic Liquid methanol (CH3OH(1)) burns in oxygen (O₂ (g)) to form gaseous carbon dioxide (CO2 (g)) and gaseous water (H₂O(g)), which is represented by the following balanced equation: 2CH3OH(1) +302(g) → 2CO2 (g) + 4H₂O(g) The balanced chemical equation is neeed to calculate the standard enthalpy change for a reaction (AH) the standard entropy change for a reaction (AS) from the standard enthalpies of formation and standard molar entropies, respectively. Part B Calculate AHxn at 25 °C. Express your answer in kilojoules to three significant figures. AH = VE ΑΣΦ C ? kJarrow_forward
- 11:32 Send a chat How much energy is required to decompose 545 g of PC13, according to the reaction below? The molar mass of PC13 is 137.32 g/mol and may be useful. 4 PC13(g) → P4(s) + 6 Cl2(g) AH°rxn=+1207 kJ O 1.68 × 103 kJ O 1.20 × 103 kJ 7.89 x 102 kJ 4.79 × 103 kJ O 2.48 × 102 kJarrow_forwardThe ΔH°rxn for the following reaction: NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l) is –55.7 kJ/mol. Given the following enthalpies of formation, determine ΔH°f of H2O(l). ΔH°f NaOH(aq) = −470.1 kJ/mol ΔH°f HCl(aq) = −167.2 kJ/mol ΔH°f NaCl(aq) = −407.2 kJ/molarrow_forwardoptions for all: 1. Reactants. 2. Products.arrow_forward
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