Acetylene (C 2 H 2 ) can be made by reacting calcium carbide (CaC 2 ) with water. (a) Write an equation for the reaction. (b) What is the maximum amount of heat (in joules) that can be obtained from the combustion of acetylene, starting with 74.6 g of CaC 2 ?
Acetylene (C 2 H 2 ) can be made by reacting calcium carbide (CaC 2 ) with water. (a) Write an equation for the reaction. (b) What is the maximum amount of heat (in joules) that can be obtained from the combustion of acetylene, starting with 74.6 g of CaC 2 ?
Acetylene (C2H2) can be made by reacting calcium carbide (CaC2) with water. (a) Write an equation for the reaction. (b) What is the maximum amount of heat (in joules) that can be obtained from the combustion of acetylene, starting with 74.6 g of CaC2?
(a)
Expert Solution
Interpretation Introduction
Interpretation:
The equation for the formation of Acetylene and the maximum amount of heat from combustion of Acetylene has to be calculated.
Concept Introduction:
The change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is called standard enthalpy of formation (ΔHf°). The standard enthalpy of formation is used to determine the standard enthalpies of compound and element.
The standard enthalpy of reaction is the enthalpy of reaction that takes place under standard conditions.
The equation for determining the standard enthalpies of compound and element can be given by,
ΔH°reaction=∑nΔH°f(products)-∑mΔH°f(reactants)
Answer to Problem 6.132QP
CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H(g)
Explanation of Solution
Calcium carbide upon reaction with Water gives Calcium hydroxide and Acetylene. The chemical reaction can be given as,
CaC2(s)+2H2O(l)→Ca(OH)2(s)+C2H(g)
(b)
Expert Solution
Interpretation Introduction
Interpretation:
The equation for the formation of Acetylene and the maximum amount of heat from combustion of Acetylene has to be calculated.
Concept Introduction:
The change in enthalpy that is associated with the formation of one mole of a substance from its related elements being in standard state is called standard enthalpy of formation (ΔHf°). The standard enthalpy of formation is used to determine the standard enthalpies of compound and element.
The standard enthalpy of reaction is the enthalpy of reaction that takes place under standard conditions.
The equation for determining the standard enthalpies of compound and element can be given by,
ΔH°reaction=∑nΔH°f(products)-∑mΔH°f(reactants)
Answer to Problem 6.132QP
The maximum amount of heat obtained is 1.51×106J
Explanation of Solution
The combustion reaction of Acetylene can be given as,
2C2H2(g)+5O2(g)→4CO2(g)+2H2O(l)
Standard enthalpy of formation of CO2=-393.5kJmol−1
Standard enthalpy of formation of H2O=-285.8kJmol-1
Standard enthalpy of formation of O2=0kJmol-1
Standard enthalpy of formation of C2H5=-226.6kJmol-1
How many signals do you expect in the H NMR spectrum for this molecule?
Br Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red
Note for advanced students: In this question, any multiplet is counted as one signal.
1
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
Check
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute
to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
O
✓
No additional Hs to color in top
molecule
ง
No additional Hs to color in bottom…
in the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstant
General, Organic, and Biological Chemistry - 4th edition
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Calorimetry Concept, Examples and Thermochemistry | How to Pass Chemistry; Author: Melissa Maribel;https://www.youtube.com/watch?v=nSh29lUGj00;License: Standard YouTube License, CC-BY