The standard molar enthalpy of formation of calcium carbonate (CaCO3) is - 1206.9 kJ/mol. What will be the enthalpy for the formation of 75 g of CaCO3? (MM = 100.1 g/mol) %3D

Q: 10.00 mL of 1.10 M  HCl  diluted to 0.450 L

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Q: A student gets a percent transmittance reading of 34.7% Calculate the absorbance reading.

A: The absorbance can be calculated as follows

Q: Metal complexes are metal atoms or ions that is surrounded by several ligands. These metal complexes...

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Q: what do we call a substance that is used to reveal whether a chemical is an acid or a base?

A: Substance that is used to reveal whether a chemical is an acid or a base

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Q: Below is a diagram showing a typical heating/cooling curve for water. It reveals a wealth of informa...

A: We would use the given heating curve to answer these questions.      Note : As you have uploaded mul...

Q: An aqueous solution contains 0.461 M ammonla. Calculate the pH of the solution after the addition of...

A: The concentration of ammonia = 0.461 M = 0.461 mol/L (M = mol/L) The number of moles of hydrobromic ...

Q: What is the value of Ksp for Cr(OH)3 if the molar solubility for chromium (III) hydroxide was determ...

A: Ksp is the product of concentration of ions of sparingly soluble salt in water.

Q: Solve the problem in gas laws. Pls answer both numbers  1. A gas occupies 900.0 mL at a temperature...

A: 1.A gas occupies 900.0 mL at a temperature of 27.0 °C. What is the volume at 132.0 °C? 2. When the v...

Q: The wavelengths of four different waves of electromagnetic radiation are given below. Which wave has...

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Q: Determine the standard enthalpy and change in internal energy of the hydrogenation of ethyne (C2H2) ...

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Q: How many mg of solute is contained in 26.0 mL of 0.250 M sucrose, C12H22O11 (342 g/mol)

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Q: (True or False, explain if its false) The value of the chemical displacement of a proton is determin...

A: In the given problem we have to discuss whether the statement given "The value of the chemical displ...

Q: What is the line structure and structural formula of 2-ethyl-3,4-demithyl-1-hexanal?

A: Given :-  name of compound = 2-ethyl-3,4-dimethyl-1-hexanal  To draw :-  line structure  structural...

Q: Describe the preparation of 2.00 L of 0.325 M HCl, starting with a 6.00 M solution of the reagent.

A: The equation for dilution is M1V1=M2V2. 

Q: The following thermochemical equation is for the reaction of Fe3O4(s) with hydrogen(g) to form iron(...

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Q: Calcium in a sample solution is determined by atomic absorption spectroscopy (AAS). A stock solution...

A: According to Beer's law, absorbance of a solution is directly proportional to its concentration. Mat...

Q: 3.25 mL of Biomarker A (4.21 x 10-7 mol L-) was brought up to volume with deionized water in a 50 mL...

A: Given data : Initial volume(V1) = 3.25 mL Initial concentration(M1) = 4.21 × 10-7 mol L-1 Final volu...

Q: According to the following reaction, how many moles of ethane (C2H6) will be formed upon the complet...

A: Given  Number of moles of H2 = 0.851 moles  Number of moles of ethane = ? H2(g) + C2H4(g) ----------...

Q: 2HX(g) H2(g) + X2(g) Estimate the energy change (in kJ) for the reaction with the following X. F i k...

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Q: A bicycle tire is inflated to a pressure of 3.74 atm at 15°C. If the tire is heated to 35°C, what is...

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Q: Calculate the energy for each level of the H and He". HYDROGEN Orbit Energy N= 1 n=2 n =3 n = 4 N =5...

A: In this question,we have to calculate the energy for each level of H and He+:

Q: E)Calculate the enthalpy for the combustion of 1.0 mol CH4, at 25 °C and 1 atm. AH° (kJ/mol) CH4(g) ...

A: CH4(g) + 2O2(g)----> CO2(g) + 2H2O(l)  

Q: Given the balanced equation: 2 LİOH + CO, 2 Li¿CO; + H,O, how much H;O will be produced if 25.4 g LI...

A: Given :-  2LiOH + CO2 →Li2CO3 + H2O  mass of LiOH = 25.4 g  mass of CO2 = 64.8 g  To calculate :-  m...

Q: 2. How H-NMR is useful to predict the tac-mer isomers of [CoL3] where HL is 8-hydroxy quinoline)? Dr...

A: This Question is based upon H1 NMR SPECTROSCOPY.

Q: Provide the IUPAC name for the condensed structural formula shown here. CH2 CH2 CH3 CH2 H3C CH CH2 H...

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)

Q: A solution of Sn^2+ is to be electrolyzed to reduce the Sn^2+ to Sn(s). Calculate the cathode potent...

A: A solution of Sn2+ is to be electrolyzed to reduce the Sn2+ to Sn(s).,

Q: Write a balanced chemical equation for the following reactions and classify reactions. i. Liquid oct...

A: Here, we have to write the balanced chemical equations and have to classify the reactions: i. when l...

Q: Determine the molar solubility for Sr:(PO:): (Ksp = 1.0 × 10-31). 3 NEXT > Based on the given values...

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Q: How much energy does it take to turn 10g of liquid water into a gas at the boiling point? Heat of va...

A: Given data : Mass (m) = 10 g Heat of vaporization (ΔHvap ) = 540 cal/g

Q: 2-14. Estimate the critical temperature and critical pressure for a mixture of 80 weight percent eth...

A: Given:- Estimate the critical temperature and critical pressure for a mixture of 80 weight percent e...

Q: Calculate the volume of a 1.5 M HCl solution needed to completely react with .25g Mg.

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Q: Indicate the products of the reaction of 2-hexanone with aqueous I2/NaOH and with subsequent hydroly...

A: The ketone having alpha- methyl group reacts with I2 and NaOH followed by little acidic workup to pr...

Q: What volume in L of a 0.724 M Nal solution contains 0.405 mol of Nal ?

A: Given, Molarity of NaI solution = 0.724 M = 0.724 mol/L moles of NaI in the solution = 0.405 mol Vol...

Q: 7. a) A solution was prepared by dissolving 0.02 moles ethanoic acid in water to give 1 L of solutio...

A: Given :-  a) Moles of ethanoic acid, CH3COOH = 0.02 mol  Volume of solution = 1 L  pH of ethanoic a...

Q: A 1.00 L buffer solution is 0.200 mol L-1 in C6H5COOH and 0.250 mol L-1 in C6H5COOLI. The Ka for C6H...

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Q: Test for Ct ion Take for instance, you have solution of new known test solution, you will add a coup...

A: Halide test We will talk about halide particles (F, Cl, Br, I) tests by utilizing silver nitrate and...

Q: Calculate the energy for each level of the H and He". HYDROGEN Orbit Energy N= 1 n=2 n =3 n = 4 N =5...

A: We have to calculate the energy for each level of the H and He+ in this question:

Q: A solution containing Mg2+ was buffered to pH 9.75 and titrated with EDTA. Eriochrome black T, with ...

A: EBT is used as metal ion indicator.

Q: A buffer solution contains 0.239 M acetic acid and 0.420 M potasslum acetate. If 0.0243 moles of per...

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Q: For a gas sample whose total pressure is 740 torr, what are the partial pressures if the moles of ga...

A: Given Data : Moles of N2 = 1.3 mol Moles of O2 = 0.33 mol Moles of Ar = 0.061 mol

Q: Monobromination Reaction. Draw the products for the monobromination reaction of 1,2-dimethylcyclopen...

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Q: Reduction potntial Voits Galvanic Ecell vut s Anode Cathode (urs) -Zocs): Pbrs)- 2ncssi Ag(s) -2n cs...

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Q: What is wrong with the Lewis structure depicted below? [Image description: A Lewis structure with a ...

A: The Lewis structure given is,  

Q: An experiment was performed to determine the heat capacity of a coffee cup calorimeter. The calorime...

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Q: Compare acetanilide, which was in the recrystallization lab and acetaminophen (2) shown below. Which...

A: Comparison of Rf values between acetanilide and Acetaminophen 

Q: What does the term "equilibrium" mean in technical language to chemists? What are the similarities a...

A: Solution: Equilibrium in short and simple term is equality between two phases/ system. In chemical t...

Q: Why does incomplete combustion occur? Select one: poor supply of energy O a. O b. poor supply of car...

A: the incomplete combustion occurs due to the

Q: Agent Precipitate Precipitate Ag+ Insoluble Dilute HCI chlorides Insoluble chlorides Pb2+ Dilute HCI...

A: We have to find the formula of the precipitate and color of precipitate.

Q: Write the suffix -ene for alkenes and -yne for alkynes

A:

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.