Zn (s) + 2HCl (aq) ZnCl2(aq) + H2(g) ted to which describes the reaction that oc

Question

Zn (s) + 2HCl (aq) ZnCl2(aq) + H2(g) ted to which describes the reaction that occurs when the two substances are mixed. g250.0 al tem 14-58. Calcium hydroxide, Ca(OH),(s), is prepared pacity b (l) to It is imp by adding calcium oxide (lime), CaO(s), to water. It is important to know how much energy is evolved as heat in order to provide for adequate cooling, A 1) to 10.0-gram sample of CaO (s) is added to 1.00 liter of water in a calorimeter with a total heat capacity of 4.37 kJ.K1. The observed increase in tem metal metal water in ontact mol) is 2.70 4.37 kJ·K". The observed increase in temperature ) is 2.70K. Calculate the value of am,n for the pro- of the duction . e su duction of 1.00 mole of Ca(OH)(s). The equation duction of 1.00 mole of Ca(OH)2(s). The equation describing the reaction is e sur- CaO(s) + H2O(l) Ca(OH)2(s) 5.0°C The 14-59. A 5.00-gram sample of potassium chloride is 8.1°C. dissolved in 1.00 liter of water in a calorimeter that has a total heat capacity of 4.51 kJ-K, The tempera-

Explanation / Answer

Molar mass of nitric acid HNO3 = 1 + 14 + 3 * 16 = 63 gm/mol

Number of moles of nitric acid = 5/63 = 0.0793650 moles

Heat capacity = 5.16 kJ K^(-1)

Heat released by the temperature increase of 0.511K = 5.16 * 0.511 = 2.63676 kJ

Molar heat capacity of solution = 2.63676/0.0793650 = 33.223176 kJ/mol

Related Questions

Navigate

• Browse (All)
• Browse Z
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.