Instructions: Below is a Concept Map on Enthalpy with missing concepts. Providethe missing concept that belongs in each box. Each of the lettered concept boxeson the concept map corresponds to the answer boxes below the map. Please payattention to direction of arrows.legative for1Is aUsesabsorbsconceptHeatAH° reactionUsed to calculateofCalculatedMeasuresusingApplication ofLatticeUsesEnergyUsed toExample ofcalculateZero forPositive foUsed tocalculateUsed to calculateReleases ABCD EF I –

Lattice energy is the energy required in the conversion of one mole of an ionic compound into its…

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Living By Chemistry: First Edition Textbook

1st Edition

ISBN:9781559539418

Author:Angelica Stacy

Publisher:Angelica Stacy

ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction

SectionU5.10: Fuelish Choices: Heat Of Combustion

Problem 3E

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Give the exaplanation of formula and concept.do not provide plagarised content otherwise i dislike When 1.863 g of naphthalene (C10Hg) is burned in a constant-volume bomb calorimeter at 298 K, 74.91 kJ of heat is evolved.Calculate AU and w for the reaction on a molar basis.Be sure your answer has the correct number of significant digits.
Three common hydrocarbons that contain four carbonsare listed here, along with their standard enthalpies offormation:
A sample of gas is contained in a cylinder-and-piston arrangement.It undergoes the change in state shown in thedrawing. (a) Assume first that the cylinder and piston areperfect thermal insulators that do not allow heat to be transferred.What is the value of q for the state change? What isthe sign of w for the state change? What can be said about ΔEfor the state change? (b) Now assume that the cylinder andpiston are made up of a thermal conductor such as a metal.During the state change, the cylinder gets warmer to thetouch. What is the sign of q for the state change in this case? Describe the difference in the state of the system at the endof the process in the two cases. What can you say about therelative values of ΔE?
Directions: Explain your answer comprehensively. Limit your justification in 3-5 sentences. 1. All Hess's Law says is that if a reaction is the sum of two or more other reactions, then the change in enthalpy of this reaction is going to be ? Explain
Three common hydrocarbons that contain four carbonsare listed here, along with their standard enthalpies offormation: (a) For each of these substances, calculate the molar enthalpyof combustion to CO2(g) and H2O(l). (b) Calculatethe fuel value, in kJ/g, for each of these compounds. (c) Foreach hydrocarbon, determine the percentage of hydrogenby mass. (d) By comparing your answers for parts (b) and (c),propose a relationship between hydrogen content and fuelvalue in hydrocarbons.
By considering the nature of the intermolecular forces ineach case, rank the following substances from smallest tolargest enthalpy of vaporization: KBr, Ar, NH3, and He. Explain your reasoning.
Since heat is always transferred to/from the calorimeter, propose a simple experiment to determine the heat capacity of the calorimeter, that is, the quantity of heat absorbed or released by the calorimeter per unit change in temperature (J/oC). This quantity is also known as the calorimeter constant
Explain me! Juliet was studying thermodynamics. She was doing well in understanding thelesson except for one concept. She was confused between the two terms, heat andtemperature. Are heat and temperature the same? Explain the difference between the twoterms.
help me find the heat capacity and the adjusted heat capacity with the unrounded and rounded values for both
Below is a list of Enthalpies of Formation. Substance Δ??(?????)ΔHf(kJmol) C3H8(g) -104.7 O2(g) 0 CH4(g) -74.9 H2O(g) -241.8 H2O(l) -285.8 CO2(g) -393.5 Provided the following information determine ΔHformation of C2H6(g). C(graphite) + O2(g) ⟶⟶ CO2(g) Δ?=−393.5??ΔH=−393.5kJ H2(g) + 1212O2(g) ⟶⟶ H2O(l) Δ?=−285.8??ΔH=−285.8kJ C2H6(g) + 7272O2(g) ⟶⟶ 2CO2(g) + 3H2O(l) Δ?=−1560.7??ΔH=−1560.7kJ
Suppose 0.562 g of graphiteis place in bomb calorimeter with excess of oxygenat 25.00 °C and 1 atm pressure. Excess O2ensures that all carbon burns to form CO2. The graphite is ignited, and it burns according to the equation.C(graphite)+ O2(g) ---> CO2(g)On reaction, the calorimeter temperature rises from 25.00°C to 25.89°C. The heat capacity of the calorimeter and it’s contends was determined in a separate experiment to be 20.70 KJ/°C. What is the heat of reaction at 25.00°C and 1 atm pressure?Express theanswer as a thermochemical equation.
Methanol 1CH3OH2 is used as a fuel in race cars. (a) Write abalanced equation for the combustion of liquid methanol inair. (b) Calculate the standard enthalpy change for the reaction,assuming H2O1g2 as a product. (c) Calculate the heatproduced by combustion per liter of methanol. Methanolhas a density of 0.791 g>mL. (d) Calculate the mass of CO2produced per kJ of heat emitted.

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