Question

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When 0.106 g of Zn(s) is combined with enough HCl to make 50.6 mL of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from 21.5 ∘C to 24.4 ∘C. Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the density of the solution and 4.18 J/g⋅∘C as the specific heat capacity.)

Answer #1

volume of solution= 50.6 ml, density of the solution = 1 g/ml

mass of the solution = Volume* density= 50.6*1= 50.6 gm

since there is a temperature rise, the reaction is exothermic.

so enthalpy change = - mass of solution* specific heat* temperature difference= -50.6*4.184*(24.4-21.5)=-614 joules

this much heat is liberated due to the reaction Zn+ 2HCl---->ZnCl2+ H2

mole of Zn used =mass/atomic weight= 0.106/65.38=0.0016

hence enthalpy change = -614/0.0016 J/mole of Zinc=378778.5 J/mole = 378.7785 KJ/mole

Zinc metal reacts with hydrochloric acid according to the
following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When
0.106 g of Zn(s) is combined with enough HCl to make 54.5 mL of
solution in a coffee-cup calorimeter, all of the zinc reacts,
raising the temperature of the solution from 21.6 ∘C to 24.5 ∘C.
Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the
density of the solution and 4.18 J/g⋅∘C as the specific heat
capacity.) In kJ/mol.

Zinc metal reacts with hydrochloric acid according to the
following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When
0.103 g of Zn(s) is combined with enough HCl to make 55.0 mL of
solution in a coffee-cup calorimeter, all of the zinc reacts,
raising the temperature of the solution from 21.7 ∘C to 24.4
∘C.

Zinc metal reacts with hydrochloric acid according to the
following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When
0.107 g of Zn(s) is combined with enough HCl to make 51.6 mL of
solution in a coffee-cup calorimeter, all of the zinc reacts,
raising the temperature of the solution from 22.2 ∘C to 24.3 ∘C.
Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the
density of the solution and 4.18 J/g⋅∘C as the specific heat

Zinc metal reacts with hydrochloric acid according to the
following balanced equation. Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When
0.119 g of Zn(s) is combined with enough HCl to make 53.4 mL of
solution in a coffee-cup calorimeter, all of the zinc reacts,
raising the temperature of the solution from 21.7 ∘C to 24.5 ∘C.
Part A Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for
the density of the solution and 4.18 J/g⋅∘C as the specific heat
capacity.)

Zinc reacts with hydrochloric acid according to the reaction
equation
Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g)
How many milliliters of 6.50 M HCl(aq) are required to react
with 3.05 g of Zn(s)?

Zinc reacts with hydrochloric acid according to the reaction
equation Zn (s)+2HCl (aq)--> ZnCl2 (aq) + H2(g) How many
milliliters of 2.50 M HCl(aq) are required to react with 3.55 g of
an ore containing 37.0% Zn(s) by mass?

Zinc reacts with hydrochloric acid according to the reaction
equation
Zn(s) + 2HCL (aq) -----------> ZnCl2(aq) + H2(g)
How many milliliters of 2.00 M HCl(aq) are required to react
with 7.05 g of an ore containing 38.0% Zn(s) by mass?

Manganese reacts with hydrochloric acid to produce manganese(II)
chloride and hydrogen gas. Mn(s)+2HCl(aq) → MnCl2(aq)+H2(g). When
0.605 g Mn is combined with enough hydrochloric acid to make 100.0
mL of solution in a coffee-cup calorimeter, all of the Mn reacts,
raising the temperature of the solution from 23.2 ∘C to 28.7 ∘C.
Find ΔHrxn for the reaction as written. (Assume that the specific
heat capacity of the solution is 4.18 J/g∘C and the density is 1.00
g/mL.)

Manganese reacts with hydrochloric acid to produce manganese(II)
chloride and hydrogen gas.
Mn(s)+2HCl(aq) →
MnCl2(aq)+H2(g)
When 0.615 g Mn is combined with
enough hydrochloric acid to make 100.0 mL of solution in a
coffee-cup calorimeter, all of the Mn reacts, raising the
temperature of the solution from 24.0 ∘C to 28.4 ∘C.
Find ΔHrxn = ? kJ for the reaction as written. (Assume
that the specific heat capacity of the solution is 4.18 J/g∘C and
the density is 1.00 g/mL.)

Zinc metal reacts with hydrochloric acid according to the
following balanced equation.
Zn(s) + 2HCl(aq) -> ZnCl2(aq) + H2(g)
the hydrogen gas is collected over water at a temperature of
20.0 degrees celsius and a total pressure of 775.2 mmHg. a total of
1.85 L of gas is collected. the vapor pressure of water at 20.0
degrees celsius is 17.55 mmHg. what is the mass of hydrogen gas (in
grams) formed

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago