Based on enthalpy of formation data species ∆H◦ f H2S(g) −20.63 kJ/mol O2(g) 0 kJ/mol H2O(ℓ) −285.83 kJ/mol SO2(g) −296.83 kJ/mol calculate ∆Hrxn for 2 H2O(ℓ) + 2 SO2(g) ←→ 2 H2S(g) + 3 O2(g) 1. 562 kJ · mol−1 2. −562 kJ · mol−1 3. −1124 kJ · mol−1 4. 1124 kJ · mol−1

Answers

Answer 1

Answer:

Answer: The enthalpy change of the reaction is 1124 kJ

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as $\Delta H^o$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H^o_(rxn)=\sum [n* \Delta H^o_f_{\text{(product)}}]-\sum [n* \Delta H^o_f_{\text{(reactant)}}]$

For the given chemical reaction:

$2H_2O(l)+2SO_2(g)\rightarrow 2H_2S(g)+3O_2(g)$

The equation for the enthalpy change of the above reaction is:

$\Delta H^o_(rxn)=[(2* \Delta H^o_f_((H_2S(g))))+(3* \Delta H^o_f_((O_2(g))))]-[(2* \Delta H^o_f_((H_2O(l))))+(2* \Delta H^o_f_((SO_2(g))))]$

We are given:

$\Delta H^o_f_((H_2O(l)))=-285.83kJ/mol\n\Delta H^o_f_((O_2(g)))=0kJ/mol\n\Delta H^o_f_((SO_2(g)))=-296.83kJ/mol\n\Delta H^o_f_((H_2S(g)))=-20.63kJ/mol$

Putting values in above equation, we get:

$\Delta H_(rxn)=[(2* (-20.63))+(3* (0))]-[(2* (-285.83))+(2* (-296.83))]\n\n\Delta H_(rxn)=1124kJ$

Hence, the enthalpy change of the reaction is 1124 kJ

Related Questions

What is agriculture
When the pH of a solution changes from a pH of 5 to a pH of 3, the hydronium ion concentration isA. 0.01 of the original contentB. 0.1 of the original contentC. 10 times the original contentD. 100 times the original content
Calculate the mass of HCl required to prepare 2.5 liters of a 0.08 molar solution of HCl. 1 H 1.01 Hydrogen 17 Cl 35.45 Chlorine
Groups of cells that work together are called .
If 7.84 x 10^7 J of energy is released from a fusion reaction, what amount of mass in kilograms would be lost? Recall that c = 3 x 10^8 m/s.7.06 x 10^24 8.71 x 10^-4 8.71 x 10^-7 8.71 x 10^-10

How are sublimation and evaporation. similar

Answers

They both turn states of matter into gases. Sublimation turns a solid into a gas, while evaporation turns a liquid into a gas. Hope this helps! :)

Research about the reaction of baking soda and vinegar

Answers

Baking soda and vinegar react because of an acid-base reaction. The product of this creates carbon dioxide.

Which scientist provided a foundation for John Dalton’s work on the atomic structure?

Answers

The scientist that provided a foundation for John Dalton’s work on the atomic structure is Sir Joseph John Thompson or J.J. Thompson. It was theorized after the discovery that electrons are present in the atom. In this model, the atom is composed mainly of electrons. It was describe as plum pudding because the electrons are dispersed within the atom.

HELP ASAPFor the reaction 2H2(g) + S2(g)<---> 2H2S(g), determine the equilibrium constant at 700oC if at this temperature, the equilibrium concentrations are as follows:
[H2] = 0.208 M, [S2] = 1.13 × 10-6 M , [H2S] = 0.725 M
A) 1.08 × 107
B) 3.49
C)4.55 × 10-7
D)3.22 × 106
E)441

Answers

Equilibrium constant of a reaction is the ratio of concentrations of the products and the reactants when the reaction is in equilibrium. This value is independent of the concentrations since the conditions are at equilibrium instead it depends on ionic strength and temperature.

First, we write the equilibrium expression.

K = [H2S]^2 / [H2]^2 x [S2]
K = (0.725^2) / [(0.208^2) (1.13 x 10^-6)]
K = 10751545.56 or 1.08 x 10^7

Thus, the answer is A.

Which ion is the only negative ion present in an aqueous solution of an Arrhenius base?(1) hydride ion (3) hydronium ion
(2) hydrogen ion (4) hydroxide ion

Answers

The correct answer is option 4. It is the hydroxide ions that is produced by an Arrhenius base in water. According to Arrhenius, acid-base reactions are characterized by acids which forms hydronium ions in water and bases which dissociates in aqueous solution to form hydroxide ions.

Under which conditions will gases best dissolve in liquids?

Answers

Gases best dissolve in liquid under low temperature. This is because when you increase the temperature it will cause an increase in kinetic energy. An increase in kinetic energy means there would be an increase in molecular motion of gas particles. This would cause for gas particles to escape to the gas phase thus making it difficult for it to be dissolved.

Answer:

when the pressure is low and the temperature is low

Explanation:

Other Questions

Which of the following is the correct electron configuration for titanium (Ti)?

Which atomic model was proposed as a result of J. J. Thomson’s work?

A 1.00 L volume of HCl reacted completely with 2.00 L of 1.50 M Ca(OH)2 according to the balanced chemical equation below. 2HCl + Ca(OH)2 > CaCl2 + 2H2O What was the molarity of the HCl solution?it is either 6.00 M or 0.375 M

Calculate the number of moles 3.15 g of HNO3 19.3 g of NaCl 21.25 g of NaNO3