When a 13.0-g sample of NaOH(s) dissolves in 400.0 mL water in a coffee cup calorimeter, the temperature of the  water changes from 22.6°C to 30.7°C. Assuming that  the specific heat capacity of the solution is the same as  for water, calculate (a) the heat transfer from system to  surroundings and (b) DH for the reaction  NaOH(s) : Na+(aq) + OH– (aq)

Q: A scientist measures the standard enthalpy change for the following reaction to be 79.4 kJ:…

A: The difference between the standard enthalpy of products and the reactants is known as change in…

Q: When 1.81 g of zinc metal reacts with 100.00 g of 1.00M HCl in a coffee-cup calorimeter, the…

A: Zinc metal reacts with Concentrated HCl is an exothermic reaction(heat produced) thus temperature…

Q: The specific heat capacity of lead at 25°C is 1.290×10-1 J/g/K. Answer the following: (a) For a…

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Q: A generic solid, X, has a molar mass of 76.0 g/mol. In a constant‑pressure calorimeter, 37.7 g of X…

A: Given Information -  molar mass of generic solid, X = 76.0 g/mol mass of X = 37.7 g  mass of water…

Q: When 2.920 g sample of benzoic acid (C6H6O2) absorbs 22.8 J of heat, its temperature increases by…

A: The amount of heat required to increase the temperature of a given quantity of the substance by one…

Q: THERMODYNAMICS: A 1.21 g sample of acetic acid (HC2H3O2) was burned in excess oxygen in a bomb…

A:

Q: Calculate the standard enthalpy change for the following reaction at 25 °C.…

A: If the reaction between the species acid and base than the salt and water will be generated.

Q: A generic solid, X, has a molar mass of 76.0 g/mol. In a constant‑pressure calorimeter, 37.7 g of X…

A: Solution:-

Q: A scientist measures the standard enthalpy change for the following reaction to be -18.4 kJ: Ca(OH)2…

A: From the Given:∆Hf° (CaCl2(s)) = -795.8 kJ/mol∆Hf° (H2O(l)) = -285.8 kJ/mol∆Hf° (Ca(OH)2(aq)) =…

Q: A chemical reaction in a bomb calorimeter evolves 3.15 kJ of heat. If the temperature of the…

A: From given data q = 3.15 kJ = 3150 J  T1= 19.19°C = 292.19 K T2= 22.03°C = 295.03 K  Formula used…

Q: You mix 125 mL of 0.260 M CsOH with 50.0 mL of 0.650 M HF in a coffee-cup calorimeter, and the…

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Q: In one experiment, a student placed 50.0 mL of 1.00 M HCl in a coffee-cup calorimeter and carefully…

A: This problem can be solved by using the following method of the calorimeter. q=m×c×△TWhere;m= mass…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

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Q: The oxidation of sulphur dioxide to sulphur trioxide is important in the manufacture of sulphuric…

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Q: The addition of  1.250 g of zinc metal (65.38 g/mol) to 0.100 L of  0.1912  M HCl in a coffee-cup…

A: The mass of solution is first determined using density and volume values as follows,

Q: A gas expands and does P-V work in the surroundings equal to 279 J. At the same time, it absorbs…

A:

Q: A generic solid, X, has a molar mass of 59.5 g/mol. In a constant‑pressure calorimeter, 45.3 g of X…

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Q: Is the dissolving of ammonium chloride an endothermic or exothermic process?

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Q: The standard enthalpy change for the following reaction is -1.20x10³ kJ at 29 2 Be(s) + O₂(g) →→→→2…

A: When divided thermochemical equation by 2 unit  then we also divide the enthalpy change value by two…

Q: A 2.59 g sample of a substance suspected of being pure gold (Cs = 0.128 J g−1°C−1) is warmed to 81.3…

A: The objective of this question is to determine the heat capacity of an unknown substance, suspected…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A:

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.38 kg sample…

A: Answer: Heat capacity can be calculated by below shown formula: Q=nC∆TQn∆T=CC=Qn∆There:Q=heat…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: Given NaClO4 is dissolved in water. The mass of NaClO4 dissolved in water =5.77  gThe mass of water…

Q: When 2.89 g of AX (s) dissolves in 125.3 g of water in a coffee-cup calorimeter the temperature…

A:

Q: The addition of 3.15 g of Ba(OH)2∙8H2O to a solution of 1.52 g of NH4SCN in 100 g of water in a…

A: Given that : Mass of BaOH2.8H2O (m1) = 3.15 g Mass of NH4SCN (m2) = 1.52 g Mass of water (m3)  = 100…

Q: When 5.89 g of a solid mixture composed of NH4CI and CaCl2 was dissolved in 100.0 mL of water, the…

A: Enthalpy of solution is the enthalpy change that takes place when a mol of substance is dissolved in…

Q: A generic solid, X, has a molar mass of 82.3 g/mol. In a constant-pressure calorimeter, 46.1 g of X…

A: Given phase change reaction;  X(s) ----->  X(aq) amount of solid X  to be dissolve in water =…

Q: A chemist wastes a delicious brownie by burning it in a bomb calorimeter.  Before burning, the…

A:

Q: When 29.5 mL of 0.500 M H2SO4 is added to 29.5 mL of 1.00 M KOH in a coffee-cup calorimeter at…

A: Write a balanced equation for the given reaction.

Q: A student determines the heat of dissolution of solid barium chloride using a coffee-cup calorimeter…

A: Heat capacity of a substance is given by,

Q: A constant volume calorimeter was calibrated by carrying out a reaction known to release 3.50 kJ of…

A: The relation is to calculate the heat capacity of calorimeter is shown as follows:

Q: Solid calcium chloride dissolves in water according to the equation below. CaCl2 (s) ➝ Ca+2 (aq) +…

A: CaCl2 (s) ➝ Ca+2 (aq) + 2 Cl – (aq)      ΔHº = –81.3 kJ/mol Heat evolved = heat absorbed = Q Q = m .…

Q: 5.00 × 10−2 mol KOH and an excess of hydrochloric acid are combined in 100.0 mL of water initially…

A:

Q: （1）Consider the reaction: 2A (g) + 3 B (g) → 2 C (g)     ΔHrxn = +254.3 kJ What will be the…

A: 2A (g) + 3 B (g) → 2 C (g) ΔHrxn = +254.3 kJ Moles of B = 0.471 moles Enthalpy Change = ?

Q: A 25.0 mL portion of dilute HCl (aq) is combined with a 25.0 mL portion of dilute NaOH in a…

A: Interpretation -  To determine the qrxn in J when a 25.0 mL portion of dilute HCl (aq) is combined…