A simple method for the laboratory preparation of hydrogen involves reaction of zinc with hydrochloric acid; Zn(s) + 2 HCl(aq) → ZnCl 2(aq) + H 2(g) ΔH = -152.5 kJ How much heat in kilojoules is evolved if a total of 1094 mL of H 2 was collected over water at 28.00 ° C and an atmospheric pressure of 275.7 mm Hg. The partial pressure of water at this temperature is 28.35 mm Hg? Assume heat evolved is directly proportional to the moles produced.

Q: When a 4.00 g sample of KSCNKSCN is dissolved in water in a calorimeter that has a total heat…

A: Mas of KSCN = 4.00 g heat capacity = 3.83 kJ⋅K−1 change in temperature = 0.260 K

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A: The balanced chemical reaction is  C(s)+O2 (g)→CO2(g); ΔrH∘=−393.5 kJ-mol-1  The mass of CO2…

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

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Q: The thermite reaction can be written as 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s)                  ΔH∘=−850kJ…

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Q: Consider the following reaction. CH3OH(g)  CO(g) + 2 H2(g)    H = +90.7 kJ (a) Is the reaction…

A: As per our guidelines we can only solve first three sub-parts of a question. Please resubmit the…

Q: . (a) We place 77.7 g of a metal at 10.00 ◦C in 333.3 g of water at 70.00 ◦C. The water is in a…

A: Dear student, we are authorised to solve only one question at a time. Please post rest of the…

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Q: Consider the following thermochemical equation: 2A -> AA, ΔHrxn=−60.0J What is the heat associated…

A: You have given - ∆Hrxn  = -60.0 J

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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: Solution:-

Q: A calorimeter initially contains 165.0 mL of water at 21.3oC. When 2.72 g K is added to the water,…

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Q: The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process, 2…

A: the solution is as follows:

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Q: How much heat was absorbed by the solution?

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Q: A generic solid, X, has a molar mass of 61.8 g/mol. In a constant-pressure calorimeter, 18.6 g of X…

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Q: A 1.00 g sample of MgCl2 produced a 10.00 °C increased in a calorimeter charged with 40.0mL of…

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Q: A gas is heated by adding 30. kJ of heat to the gas.  As it heats, it also expands from 30. L to 50.…

A: • The values provided in the question are:-  i) Quantity of heat energy absorbed by the gas, Q = 30…

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Q: Use the table below of enthalpies of formation to determine the heat of the following reaction.…

A: The details solution for this is provided below in attach image.

Q: When 5.54 g of a solid mixture composed of NH.Cl and CaCl2 was dissolved in 100.0 mL of water, the…

A: