Activated complex 400 (b) 300 Products Potential Energy |(a) 200 (c) 100 Reactants Reaction Pathway Alex thinks that the graph above represents an exothermic reaction and the AH = +400kJ and energy will be released in this reaction. Is Alex correct? If not, find his error and then correct it with explanation.

Activated complex 400 (b) 300 Products Potential Energy |(a) 200 (c) 100 Reactants Reaction Pathway Alex thinks that the graph above represents an exothermic reaction and the AH = +400kJ and energy will be released in this reaction. Is Alex correct? If not, find his error and then correct it with explanation.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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14. Given the 2 reactions below: I. 2NO II. 2Li,O + 1192 KJ Which statement is correct? a) reaction I- endothermic; reaction Il - exothermic b) reaction I- heat energy is released; reaction II – heat energy is absorbed c) reaction I- AH sign is positive; reaction II - AH sign is negative d) all of the above 2NOE) 113KJ + → 4Ligs) + O:(g)
Calculate AHrxn for the reaction 2Ni(s) +2S(s) + 30,(g) 2NISO,(s) from the following information: 1. NİSO;(s) → NiO(s) + SO,(g) = 156 kJ rxn 2. S(s) +0,(g) > so,(g) AH =-297 kJ rxn 3. Ni(s) + 0,(8) NiO(s) =-241 kJ. rxn AH xn= kJ
Use the information provided to determine AH°rxn for the following reaction: AH°f (kJ/mol) CH4(3) + 3 Cl2(g) → CHC|3{1) + 3 HCI(g) AH°rxn = ? CH4(3) -75 CHCI3() -134 HCI(g) -92 -217 kJ O -151 kJ +117 kJ +662 kJ O -335 kJ
A chemist measures the energy change AH during the following reaction: C3H3(9)+502(9) – 3 CO,(9)+4H,0(1) AH=-2220. kJ Use the information to answer the following questions. endothermic. This reaction is... exothermic. Suppose 17.2 g of C,Hg react. Yes, absorbed. Yes, released. Will any heat be released or absorbed? No. If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. O kJ Be sure your answer has the correct number of significant digits.
Determine AHjattice for KBr if the AHsolution (KBr) = +19.9 kJ/mol and the AHnydration (KBr) = -670. kJ/mol. +650 kJ/mol -650 kJ/mol +690 kJ/mol -710 kJ/mol -690 kJ/mol
The change in energy for the reaction represented by the following diagram can be calculated by subtracting "arrow 1" from "arrow 2." Reactants Products Reaction P rogress O True False Energy
Bombardier beetles are called as such because their defense mechanism involves shooting a hot chemical spray when attacked. Their abdomen contains two separate chambers, one bearing hydrogen peroxide, and the other, hydroquinone. When there is an attack, the two aqueous solutions are mixed in another enzyme-containing chamber, and the overall exothermic reaction is as follows: The released energy raises the temperature of the mixture to the boiling point of water, which is way hotter than the beetle’s body temperature at 20 °C. Calculate the amount of energy (in kJ) needed to heat 1 L of this mixture by this amount. Assume the specific heat capacity of the mixture is the same as that of pure water (4.18 J/gK and that the density of the mixture is the same as that of pure water, 1.00 g/cm3. Assuming equal volumes of the two solutions are mixed, what is the minimum concentration of the hydrogen peroxide solution in the beetle’s hydrogen peroxide chamber? The standard enthalpy…
Which process is a physical change? р process 1: H₂O₂(1) --> H₂(g) + O₂(g) process 2: H₂(g) + Cl₂(g) --> 2 HCl(g) process 3: C₂H₂(1) --> C6H(s)
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For the combustion of carbon monoxide; CO + 1/2 02- CO, find the ratio of the equilibrium 25 *C constants for the reaction at 50 °C and 25 °C, Keg50 "C/ Keg formation (at 25 °C) for CO, O2, and Co, are -110.52 kJ/mol, O kJ/mol, and -393.51 kJ/mol The standard enthalpies of respectively. Assume the reaction enthalpy to be constant over this temperature range, i.e. from 25 °C to 50 °C. O A. 6.85 x 1o O B. 1.46 x 104 C. 0.99 D. 1.01 E. 2.34 x 10 296
Which of the equations below would be classified as highly exothermic? O a 2NAHCO3() + 85 kJ → NasC03() + H2O0)+ CO2(e) O b 2Mg(s) + O2(s)→2MgO() + 1204 kJ 2A2O3(s) + 3352 kJ → 4Ale) + 302(e) O d CaO(s) + H2O)) Ca(OH)(s) + 65.2 kJ
Determine the AH of the reaction 1 1 NO2(9) + 702cg) +;H20g) → HN03(aq) 1 5 N2cg) + O2(g) → NO2(9) NO29) AH = 33.2 kJ 1 1 3 Hzo) + Naca) +02l@) → HNO3(a2) AH = -202.3 kJ ΔΗ +5N2(9) +502(g) → HNO3(aq) 1 +,02(9) → H20(9) AH = -285.8 kJ H2(g)