Another student dissolves 5.55 g of magnesium sulfate in 53.62 g of water. The temperature changes from 21.7 °C to 25.6 °C. Calculate the energy (heat, in Joules) transferred to the solution during the dissolution of this sample of magnesium sulfate. 875 J 966 J -875 J -966 J

Q: A student performed this experiment by mixing 50.0 mL of 2.0 M NaOH solution with 50.0 mL of 2.0  M…

A: Given: Concentration of NaOH reacting = 2.0 M Volume of NaOH solution = 50.0 mL = 0.050 L…

Q: 8. Determine the amount of heat required to raise the temperature of 2.40 g of silver from 25.0 °C…

A: Specific heat : It is the ratio of the quantity of heat required to raise the temperature of a…

Q: 0.700 moles of an unknown solid is placed into water to make 150.0 mL of solution. The solution's…

A: Answer :-- Using the formula for heat (q) is :-q = m⋅C⋅ΔTm (mass of the solution) = ρ⋅V (density ×…

Q: A 36.45 g sample of a substance is initially at 28.4 °C. After absorbing 1041 J of heat, the…

A: The mass of the substance is = 36.45 g The increase in the temperature of the substance is =…

Q: Macmillan Learning Revell SECOND EDITION q= A chemist dissolved an 12.7-g sample of KOH in 100.0…

A: Given,  Mass of the sample, m1 = 12.7 g  Mass of water, m2 = 100 g  Specific heat of water, C =…

Q: 3. A paraffin wax candle weighs 10.553 grams. The candle is lit and then immediately placed in a…

A: 3. Given, Initial mass of a paraffin wax candle = 10.553 g. Amount of water in calorimeter = 125 g.…

Q: A student dissolves 14.8 g of sodium chloride (NaCl)in 250. g of water in a well-insulated open cup.…

A: mass of NaCl = 14.8 gmass of water = 250. gmolar mass of NaCl = 58.44 g/molInitial temperature(Ti) =…

Q: an alternative to combustion, coal gas can undergo a process called methanation.  3 H2(g)  +  CO(g)…

A: Hess's law states that regardless of multiple stages or steps of a reaction, the total enthalpy…

Q: 6. Which of the following reactions is endothermic?a. H2(g) + 1/2 O2(g) → H2O(g) H = –243 kJ/molb.…

A: An endothermic reaction is a type of chemical reaction that absorbs heat from the surroundings. In…

Q: A student dissolves 12.7 g of sodium chloride (NaCl)in 250. g of water in a well-insulated open cup.…

A: It is based on the concept of enthalpy of  dissolution of salt Here we  are  required to find the…

Q: In a calirometer 50.00 mL of 2.50 M NaOH was combined with 50.00 mL of 2.25 M HCl from a solution.…

A:

Q: A student performed this experiment by mixing 50.0 mL of 2.0 M NaOH solution with 50.0 mL of 2.0  M…

A: Given :-  Volume of HCl = 50.0 mL = 0.0500 L  Molarity of HCl = 2.0 M = 2.0 mol/L  Volume of NaOH =…

Q: 11 A chemist carefully measures the amount of heat needed to raise the temperature of a 511.0 mg…

A: The objective of this question is to calculate the molar heat capacity of C4H11N using the given…

Q: A student performs a calorimetry experiment. The student combines 100. g of 0.40 M HC1(aq) with 100.…

A: Heat absorbed by the particular species = mass × heat capacity × temperature change

Q: Payal

A: The objective of this question is to calculate the heat of reaction, qrxn, for the given chemical…

Q: A student dissolves 12.1 g of lithium chloride (LiCl)in 300. g of water in a well-insulated open…

A: Mass of lithium chloride = 12.1 g Initial temperature, T1 = 21.0 °C Final temperature, T2 = 27.8 °C…

Q: fy the reaction endothermic or exothermic and give the cha on. (s) + 2 Fe (s) + 645 kJ → 2 Al (s) +…

A: As heat is added to reaction,  so it is endothermic reaction.

Q: In the neutralization reaction, if 30 ml of 1.5M HCI reacted with 25 ml of 2M NaOH, the final…

A: Given,The volume of 1.5 M HCl= 30 mLThe volume of 2 M NaOH= 25 mLThe increase in temperature= 7.8…

Q: a. N2 (g) + 3Cl2(g) → 2NCl3(g) ΔHo = 460 kJ/ mol; ΔSo = - 275 J/ K b. N2(g) + 3F2(g) → 2NF3(g) ΔHo =…

A: Here given multiple question...

Q: Which following reaction is exothermic? OC₂H4(g) + O₂(g) → 2C(s) + 2H₂O(g) PC13(g) + Cl₂(g) →…

A: For an exothermic reaction, the energy of the products is less than the energy of the reactants.

Q: Think of the process where potassium chloride or lithium chloride dissolves in water. Between the…

A: The least quantity for energy essential to separate any molecular entity's constituent ions is…

Q: A student dissolves 14.8 g of sodium chloride (NaCl)in 250. g of water in a well-insulated open cup.…

A:

Q: ΔH = +572 kJ for the decomposition of water by the reaction 2 H2O() → 2 H2(g) + O2(g). How many…

A: Number of moles decomposed = Heat given/Molar heat of decomposition Mass = Number of moles x molar…

Q: Which of the following process will release the most energy?

A: Cl2 ,Br2,I2 break into ions is endothermic  reaction.  these reaction  required energy .

Q: When sodium chloride (NaCl) dissolves, it absorbs 3.9 kJ/mol. What energy diagram would accurately…

A: Endothermic reaction :-       The reactant absorb heat energy during the reaction is called…

Q: 8 sulmpie UI SUINU SOdlum hydroxide dissolves emperature rises from 21.6 °C to 37.8 °C. Assume that…

A: we know q = CnaohdT + MwaterCwaterdT where q = heat , C = heat capacity , M = mass of water , dT =…

Q: 22.9 mL of an unknown acid was neutralized by mixing it with 50.3 mL of NaOH in an aqueous solution.…

A: Total volume of the solution = 22.9 mL acid+50.3 mL base=73.2 mL Density of the solution is 1.00…

Q: When a 8.00 g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of…

A:

Q: A student dissolves 12.6 g of ammonium nitrate (NH4NO3) in 200. g of water in a well-insulated open…

A: * The temperature of the water fall from 22°C to  17.9°C  As the temperature is decreased, means…

Q: Is dissolving AgNO3 in water an exothermic or endothermic process? What about dissolving MgSO4 in…

A: A chemical reaction in which heat energy is released is called exothermic reaction. Enthalpy is…

Q: Identify the correctly written "formation reaction" among the following reactions. Hint: Recall the…

A: Introduction: A formation reaction is a reaction where one mole of product is formed from its…

Q: A student dissolves 11.9 g of ammonium nitrate (NH4NO3) in 200. g of water in a well-insulated open…

A: Answer-1Since, temperature of the water is falling which means energy is being absorbed during the…

Q: Which of the following represents an endothermic reaction? CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g) +…

A: An endothermic reaction is a chemical reaction where the reactants absorb heat from surrounding and…

Q: A student mixes 67.0 mL of a 2.01 M sodium hydroxide solution with 22.4 mL of 6.45 M hydrochloric g…

A:

Q: Which of the following represents an endothermic reaction? CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g) +…

A: Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the…

Q: The heat of reaction for the reaction A + 2B → 2C is 900. kJ. The heat of reaction for the reaction…

A: For reaction :  A → 2D

Q: A student dissolves 10.8 g of sodium chloride (NaCl)in 200. g of water in a well-insulated open cup.…

A: The reaction in which heat is released is known as exothermic reaction whereas the reaction in which…

Q: A student dissolves 14.0 g of ammonium nitrate (NH4NO3) in 200. g of water in a well-insulated open…

A: a.) First we check the heat released or absorbed by temperature change.  b.) We can calculate heat…

Q: 4. In an experiment, 1.010 g of sugar (molar mass = 3423 gmol) gave off 16.7 kJ of hest in a…

A: Heat of combustion : It is defined as the amount of energy released when one mole of a substance is…

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.