c) In an experiment, 15.3g of sodium nitrate were dissolved in water in a calorimeter and the temperature was observed to fall by 3.4°C. Taking the heat capacity of the calorimeter and content to be 1070J/°C.i- State the type of reaction taking place.ii- Calculate the number of moles of sodium nitrate in solution.iii- Calculate the enthaply change on dissolving one mole of substance.

Q: A 0.500-g sample of KCl is added to 50.0 g of water in a calorimeter (as shown). If the temperature…

A: In case of a calorimeter we can relate the heat change of a system to the product of the mass of the…

Q: Which statement is true of the internal energy of a system and its surroundings during an energy…

A: The true statement of the internal energy of a system and its surroundings during an energy exchange…

Q: What are three different methods to calculate ΔG° for a reaction?

A: INTRODUCTION: ΔG° for a reaction called as standard free energy for a chemical reaction.

Q: Hot packs used by skiers use the crystallization of sodium acetate from a concentrated solution.…

A: Enthalpy change is defined as the amount of heat released or absorbed in a chemical reaction. It is…

Q: How much heat will be released (AH) if 0.4501 mol of NH3 are mixed with 0.20 mol of O2 in the…

A:

Q: How much heat (in kJ) is produced by the complete combustion of 52.2 g of CH4? Use 1.01 g/mol for…

A:

Q: Given the reaction: 2??2?3(?) → 4??(?) + 3?2(?) ∆?? = 2269.4 ?? How much heat in kJ is required to…

A: Given equation is2Cr2O3→4Cr+3O2         ∆G=2269.4 kJfrom balanced equation4 moles of Cr production…

Q: Given the reactions,   X(s)+1/2O2(g)⟶XO(s)   Δ?=−807.5 kJ   XCO3(s)⟶XO(s)+CO2(g)    Δ?=+390.3 kJ…

A: It is given that the change in enthalpy of the given net reaction need to be calculated and the…

Q: The AG° for the combustion of propane is -2073 kJ/mole. What is the AG° for the following reaction?…

A:

Q: Which of the following processes is/are endothermic? (i) The chemical change in a hot pack often…

A: A process is said to be endothermic if it absorbs heat in the process whereas in exothermic process…

Q: Aluminum metal reacts with chlorine with a display of sparks: 2 Al(s) + 3 C12(g) → 2 AICI3(s) AH =…

A: Given- Weight of Al=5.000g Molar mass =26.982g/mol  2Al(s)+3Cl2(g) -> 2AlCl3(s)

Q: A 10.0 g piece of metal is heated to 80.0 ° C and placed in 100 g of 23 ° C water. When the system…

A: Specific heat of metal = 0.37  J g-1 oC

Q: Give examples of instances or activities that require or produce energy. Where this energy came…

A: Please find the answers below.

Q: When a 7.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of…

A:

Q: Use the following thermodynamic data to calculate how much heat in kJ is required to change the…

A: Given : Mass of acetone = 66.1 g Initial temperature of acetone = -82.2 oC And final temperature of…

Q: How much energy is absorbed during the complete reaction of 233.0 g calcium oxide (MW = 56.08 g/mol)…

A: First convert the given mass of CaO into moles. Moles=MassMolar mass=233.0g56.08 g/mol=4.155 mol

Q: How much heat will be released (∆H) if 0.4501 mol of NH₃ are mixed with 0.20 mol of O₂ in the…

A: This problem is based on the concept of limiting reagent.

Q: An exothermic reaction causes the surroundings to: A. become basic B. decrease in temperature C.…

A:

Q: Consider the reaction. 2 Fe,0, 4 Fe +302 AHixn +824.2 kJ The formation of 58.0 g of Fe results in

A: As per the balanced reaction- Generation of 4 mol Fe requires 824.2 kJ energy. So, Energy absorbed =…

Q: Aluminum chloride can be formed from its elements: (i) 2Al(s) + 3Cl2(g) ⟶ 2AlCl3(s) ΔH° = ? Use the…

A: Given data, HCl(g)→ HCl(aq)                         ;ΔH°=-74.8kJ      ---1H2 (g) + Cl2 (g) →2HCl(g)…

Q: Consider the reaction: When a 10.0-g sample of ethyl alcohol (molar mass = 46.07 g/mol) is…

A: The given reaction is : C2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l)        ∆H=-1.37×103 kJ

Q: Write the formation reaction for each of the following substances. (a) CH4(g), (b) C3H8(e), (c)…

A:

Q: The ∆Hfº of MgO is –602 kJ•mol‒1.  When 20.15 g MgO is decomposed at constant pressure according to…

A: Given,ΔHf = -602 KJ/molMass of MgO = 2015 gMolar mass of MgO = 40.3044 g/mol

Q: Write the formation reaction for each of the following substances. (a) CH4(g), (b) C3H8(e), (c)…

A: • Formation reaction are those where one mole of substance formed   from its consituent elemnt in…

Q: According to the following reaction, how much energy is evolved during the reaction of 32.5 g B2H6…

A:

Q: 46.0 g of a mercury alloy is heated from 20.0°C to 105.°C, and absorbs 550. joules of heat in the…

A: q = mc∆T  q is heat , m is Mass , c is specific heat capacity , ∆T is the difference in temperature…

Q: Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently…

A: Enthalpy change for the reaction recovering1.23 mol Cu is determined as follows,

Q: How does the effect of temperature change differ for an exothermic reaction compared to an…

A: Temperature change is the flow of heat gets increased or decreased during the reaction.

Q: Which does NOT describe an exothermic reaction? a. Heat is released together with the products of…

A: A chemical reaction in which heat is evolved along with products is known as exothermic reaction.…

Q: An automobile engine provides 501 Joules of work to push the pistons. In this process the internal…

A: According to the first law of thermodynamics: ∆U=Q + W where, ∆U=Change in internal energy Q= Heat…

Q: A 8.17 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Weight of a compound divided by its molecular mass (MM) gives the moles of the compound.

Q: A 5.29 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Given information: Mass of unknown sample = 5.29 g Mass of water = 150.00 g Heat gained by solution…

Q: Determine how much energy in kJ is absorbed when 6.03 g of HA, the limiting reactant, are completely…

A:

Q: A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2…

A: a. Given:

Q: Consider the following reaction: MgCO3 (s) → Mg0 (s) + CO2 (g) AHrxn= -20.2 kJ/mol a) Is this an…

A: a) The negative sign present in value of ∆Hrxn shows that heat is released into surroundings.…

Q: The reaction for the fermentation of glucose is … C6H12O6 (aq) à 2CO2(g) + 2C2H5OH(aq)     ΔHrxn =…

A:

Q: Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter.…

A: Since the temperature of the calorimeter is decreasing Means the energy is being supplied to the…

Q: a. Hydrogen cyanide is used in the manufacture of clear plastics such as Lucite and Plexiglas. It is…

A: a. The given balanced chemical reaction is  2NH3(g) + 3O2(g) +2CH4(g) →2HCN(g)+6H2O(g) Given data…

Q: There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of…

A: The standard enthalpy of a reaction is the change in the enthalpy which occurs in a system when the…

Q: H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g) → 2HF(g); ΔH° = –271…

A: According to thermodynamics, we deal with two types of reactions: Exothermic: The type of reaction…

Q: Consider the data about gold metal in Exercise 5.26(b).(a) Based on the data, calculate the specific…

A: a.

Q: How much heat (in kJ) will be released (∆H) if 0.5093 mol of NH₃ are mixed with 0.200 mol of O₂ in…

A:

Q: 4HCN(l) + 5O2(g) 2H2O(g) + 4CO2(g) + 4N2(g) This reaction occurs spontaneously as written when all…

A: Go is calculated by using following formula,ΔGo = ΔGoproduct   - ΔGoReactatnt

Q: Pls help ASAP

A: The answer is given as follows

Q: Consider the following heat of reaction: 4NHB 50MANO + 6H2Oo AH = -12.88 kJ How much heat is…

A: From the balanced equation: Number of moles of water formed = 6 Energy released = -12.88 kJ Energy…

Q: How much heat will be released (∆H) if 0.5659 mol of NH₃ are mixed with 0.20 mol of O₂ in the…

A: Given: The reaction is as follows, 4NH3(g)+O2(g) → 2N2H4(g)+2H2O(g)      ∆H° = -286 kJ/mol Moles of…

Q: When 1 mole of CH4(g) reacts with H2O(g) to form H2(g) and CO(g) according to the following…

A: Answer: Endothermic Since 206 kJ of energy is absorbed,  Energy abosrbed process are called…

Q: When NaNO2(s) is dissolved in water the process is endothermic.  What happens to the temperature of…

A: The process of the dissolving NaNO2(s) in water is endothermic. The enthalpy change for the…