How many calories of heat are produced or absorbed when a solution of HF and KOH are mixed resulting in a total mass of 42.0 g and the temperature changes from 22.5 oC to 28.2 oC.  The specific heat is 0.920 cal/g o C.

Q: the temperature of the salt and water is 23.72 °C. After the salt has completely dissolved, the…

A: Given : Heat gained by the solution = 3116 J

Q: What is the final temperature (in °C) of 920.1 g of water (specific heat = 4.184 J/g.°C) at 24.20°C…

A: Given, the mass of water=920.1g Its specific heat capacity=4.184J/g.oC The initial temperature of…

Q: What is the final temperature (in °C) of 470.1 g of water (specific heat = 4.184 J/g･°C) at 24.20°C…

A:

Q: If 27.5 g of MgCl₂ are dissolved 500.0 g of water at 20.0 °C in an insulated container, a…

A: Given that, The mass of the MgCl2 is 27.5 g. The mass of the water is 500.0 g. So, the total mass of…

Q: Which of the following is true about enthalpy changes when a salt dissolves in water? if the…

A: Enthalpy of the reaction changes when heat is absorbed or released from the reaction.

Q: The lattice energy of CsF is -744 kJ/mol, whereas that of BaO is -3029 kJ/mol. Explain this large…

A: Given information: Lattice energy of CsF = -744 kJ/mol Lattice energy of BaO = -3029 kJ/mol

Q: Sodium acetate dissolves readily in water according to the following equation. NaC2H3O2 (s) →>…

A: The heat of a reaction or enthalpy of a reaction is the enthalpy change, which takes place at…

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

A: Given: The number of moles of unknown solid is 0.700 moles. The volume of solution is 150.0 mL. The…

Q: Explain in words the formula that can be used to determine Δ H rxn ° when usingHess’s law.

A: Interpretation - The formula used to determine ∆Horxn using Hess's law is to be explained.

Q: If 130 grams of potassium nitrate (KNO3) is added to 100 grams of water , at what temperature is the…

A: Given:- If 130 grams of potassium nitrate (KNO3) is added to 100 grams of water.                  We…

Q: If a student wants to make 225.0 mL of a 17.65M stock solution of ZnCl 2, how many grams of solid,…

A:

Q: O A generic solid, X, has a molar mass of 81.6 g/mol. In a constant-pressure calorimeter, 19.5 g of…

A: According to calorimetry heat absorbed by one substance (cold body) is equal to the heat released by…

Q: What is the final temperature (in °C) of 940.1 g of water (specific heat = 4.184 J/g･°C) at 24.20°C…

A: Given,  The final temperature (in °C) of 940.1 g of water (specific heat = 4.184 J/g･°C) at 24.20°C…

Q: In a coffee-cup calorimeter, 29.8 g sample of solid KCl is dissolved in 100.0 g of water at 15.0 °C.…

A: Heat of solution :- It is measured by the change of enthalpy during formation of solution. This can…

Q: Choose the most suitable definition for "enthalpy of solution". Select one: O a. The quantity of…

A: The enthalpy of solution, enthalpy of dissolution, or heat of solution is the enthalpy change…

Q: 29. In a calorimetry experiment, 7.46 g of potassium chloride is dissolved into 100.0 g of water at…

A: The question is based on the concept of specific heat capacity.   it is defined as the amount of…

Q: B. Solubility of KNO3 1. Mass of 2. Mass of Container + KNO, 4. Mass of 3. Temperature 5. Solubility…

A: Solution - According to the question - Dissolution of KNO3 per 100 mL water ; Temperature (oC)…

Q: A solution is made by mixing 212.0 mL of ethanol initially at 10.0 C with 212.0 mL of water…

A:

Q: How much heat, in joules and in calories, must be added to a 75.0–g iron block with a specific heat…

A: Heat is the transfer of energy due to the difference in temperature.

Q: 100 g of a solution (specific heat of 0.32 J/g C) undergoes a reaction in which 74.84 J of heat is…

A: Mass of solution = 100 g Specific heat = 0.32 J/g oC Heat released = 74.84 J

Q: A generic solid, X, has a molar mass of 65.9 g/mol. In a constant‑pressure calorimeter, 20.5 g of X…

A: Calorimetry can be used to determine the heat transfer associated with a reaction by measuring the…

Q: How much would the temperature (in °C) of 260. g of water at 25°C increase if 37.7 kJ of heat were…

A: The relationship between amount of heat of a substance and mass, specific heat, and change in…

Q: What is the final temperature in degree C when 10.00 grams of Calcium chloride are dissolved in…

A: The heat absorbed by the solution can be calculated by the following formula. ∆H=-qq=mc∆T∆H=enthalpy…

Q: In a coffee-cup calorimeter, 23.8 g sample of solid KBr is dissolved in 100.0 g of water at 15.0 °C.…

A: Given mass of water = 100 g Mass of KBr = 23.8 g Molar mass of KBr = 119 g/mol specific heat (C) =…

Q: What is the final temperature (in °C) of 850.1 g of water (specific heat = 4.184 J/g･°C) at 24.20°C…

A:

Q: how many joules of heat are required to heat 25.0 g of ethyl alcohol from the prevailing room…

A: Given, mass of ethyl alcohol is 25.0g, initial temperature is 22.50C, final temperature is 78.50C.…

Q: Which of the following suggests that the process of dissolving a solid sample in a constant-pressure…

A: Given: To explain how can we know that the dissolving of a solid sample in a constant-pressure…

Q: Solve this

A: Introduction: Specific heat: The quantity of heat required by a 1 mole of a substance to raise the…

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

A: Given : Moles of solid dissolved = 0.700 mol Change in temperature of the solution = -8.41 oC…

Q: Calculate the energy change (with the correct sign) when the temperature of 100.0 ml of liquid water…

A: Density of water is 1.00 g/mL Mass of solution is calculated as follows,

Q: Potassium nitrate, KNO3KNO3, has a molar mass of 101.1101.1 g/mol. In a constant-pressure…

A:

Q: If the dissolution of a salt in water is an endothermic reaction, how will the temperature of the…

A:

Q: 18. What is the final temperature (in °C) of 750.1 g of water (specific heat = 4.18 J/g･°C) at…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: If 80.5 g of KBr are dissolved in 400.0 g of water at 25.0 °C in an insulated container, a…

A: The amount of KBr dissolved is = 80.5 g The heat of the solution of KBr is = 19.9 kJ/mol The mass of…

Q: A student mistakenly uses 0.31g Mg. Will the temperature change of the solution be affected/ If so,…

A: Given that -  Mass of magnesium mistakenly used = 0.31 g  Mass of magnesium actually used = 0.15 g…

Q: What is the final temperature (in °C) of 230.1 g of water (specific heat = 4.184 J/g°C) at 24.20°C…

A:

Q: how many calories are required to raise the temperature of 255g of water from 42c to 75c?

A:

Q: M9SO4 Mass of salt, g 15.0 Molar mass of salt, g/ 120.366 mol Moles of salt, mol 1.25x10^-1 Volume…

A: The data given is,

Q: If the heat of solution of a salt is highly endothermic and 100 g of that salt are dissolved in 1 L…

A: When heat of solution of a salt is highly endothermic it means that during dissolution of that salt…

Q: Calculate the enthalpy change of the freezing of 287 g of water.

A: Determination of no. of mol of H2O: n=wM=287 g18.01528 g/mol=15.931 mol

Q: If the solution mixture becomes colder, which of the following statements is true? O The reaction is…

A: If the solution mixture become colder, which of the following statements is true.  Options are :

Q: 1. Zinc metal reacts with aqueous hydrochloric acid to produce zinc(II) chloride and hydrogen gas.…

A: Since you have posted a question with multiple sub parts, we are entitiled to answer only first 3…

Q: How many calories of heat are required to lower the temperature of 550 grams of water from 64.4℉ to…

A:

Q: If 30.5 g of LiBr are dissolved 350.0 g of water at 20.0 °C in an insulated container, a temperature…

A: The mass of LiBr = 30.5 g The mass of water = 350.0 g The temperature of water = 20.0 °C ΔH of…

Q: What is omh's law?

A:

Q: How much energy (in kJ) is released when 275 g of water (H2O) is formed according to the following…

A:

Q: What is ΔSsurr (in J/K) if ΔHsys is -27.2 kJ and T is 379 K?

A: • The values provided in the question are:-    i) Enthalpy change for the system of a spontaneous…

Q: solution

A: When energy is absorbed by the Solution then temperature will Decreases, this reaction is called…