Determine the minimum mass of hydrogen gas required to produce

Asked by wiki @ in Chemistry viewed by 824 People

Hydrogen gas reacts with oxygen to form water. 2H2(

g.+O2(
g.→2H2O(
g.ΔH=−483.5kJ Determine the minimum mass of hydrogen gas required to produce 216 kJ of heat.

Answered by wiki @


The reaction is as follows:
2 H₂(g) + O₂(g) → 2 H₂O(g) . ΔH = - 483.5 kJ
Using the change in enthalpy and heat, calculate the moles as follows:
Moles of H₂ = -  \frac{amount of heat released}{ΔH} x 2 mol H₂
                  = - 216 kJ / (-483.5 kJ) x 2 mol H₂ 
                  = 0.893 mol H₂
Calculate the mass of H₂ using the moles and molar mass as follows:
0.893 mol H₂ x (2.02 g H₂ / 1 mol H₂) = 1.79 g H₂
Therefore, the mass of hydrogen gas is 1.79 g


Similar Questions

Calculate the moles of hydrogen gas produced by the reaction

Asked by wiki @ in Chemistry viewed by 465 persons

calculate the volume of hydrogen gas that is produced by the reaction of 0.52 grams of solid magnesium with excess hydrochloride acid (HCl). This is a single replacement reaction.

What gas is produced by the decomposition of hydrogen peroxide

Asked by wiki @ in Chemistry viewed by 307 persons

What gas was produced by the decomposition of hydrogen peroxide? what happened when the smoldering toothpick came into contact with the gas? b boldi italicsu underline bulleted list numbered list …

What two measurements are required to determine body mass index

Asked by wiki @ in Health viewed by 246 persons

What two measurements do adults need to calculate their body mass index? A. Age and gender B. Height and width C. Body fat percentage D. Height and weight

Nitrogen gas and hydrogen gas combine to produce ammonia gas

Asked by wiki @ in Chemistry viewed by 257 persons

Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3). Which equation correctly represents this reaction? A. N + H → NH B. 2N2+ H2 → 3NH3 C. …

Nitrogen gas combines with hydrogen gas to produce gaseous ammonia

Asked by wiki @ in Chemistry viewed by 385 persons

Nitrogen gas reacts with hydrogen gas to produce ammonia gas . Write a balanced chemical equation for this reaction.

Which compound contains the highest percent by mass of hydrogen

Asked by wiki @ in Chemistry viewed by 150 persons

11 Which compound has the greatest percent composition by mass of sulfur?(1) BaS (3) MgS (2) CaS (4) SrS

What is the mass of 1 mole of fluorine gas

Asked by wiki @ in Chemistry viewed by 261 persons

Fluorine gas consists of diatomic molecules of fluorine (F2). How many molecules of fluorine are in one mole of fluorine?

How to calculate the molar mass of an unknown gas

Asked by wiki @ in Chemistry viewed by 432 persons

The molar mass of unknown gas was measured by effusion experiment. it was found that it took 63s for the gas to effuse, whereas nitrogen gas required 48s. what is …

Why hydrogen gas is collected by downward displacement of water

Asked by wiki @ in Chemistry viewed by 286 persons

Hydrogen gas is collected by downward displacement of water why​

Determining the molar mass of an unknown acid by titration

Asked by wiki @ in Chemistry viewed by 271 persons

An unknown solid acid has a formula h2x. How could you determine the molar mass of the unknown acid for a titration with 0.455 m koh using phenolphthalein indicator?

How many moles of methane are required to produce 22g

Asked by wiki @ in Chemistry viewed by 270 persons

How many moles of methane are required to produce 22g co2 after combustion

Why is hydrogen gas collected by downward displacement of water

Asked by wiki @ in Chemistry viewed by 287 persons

Hydrogen gas is collected by downward displacement of water why​

A minimum cash balance required by a bank is called

Asked by wiki @ in Business viewed by 232 persons

A minimum cash balance required by a bank is called

What is the mass of one mole of oxygen gas

Asked by wiki @ in Chemistry viewed by 251 persons

One mole of oxygen gas has a mass of ________ g. one mole of oxygen gas has a mass of ________ g. 32.0 6.022 × 1023 16.0 8 none of …

The time required to produce one cycle of a wave

Asked by wiki @ in Physics viewed by 270 persons

The time required to produce one cycle of a wave is known as the waves

Most viewed questions in Chemistry

What is the difference between a white and red reaction

Asked by wiki @ in Chemistry viewed by 1748 persons

Convert 8.00 x 10 20 molecules of h2 to moles

Asked by wiki @ in Chemistry viewed by 1619 persons

A vitamin c tablet containing 250 mg of ascorbic acid

Asked by wiki @ in Chemistry viewed by 1043 persons

Calculate the molality of a 20 by mass ammonium sulfate

Asked by wiki @ in Chemistry viewed by 886 persons

How many carbon atoms are in 2.12 mol of propane

Asked by wiki @ in Chemistry viewed by 856 persons

Determine the minimum mass of hydrogen gas required to produce

Asked by wiki @ in Chemistry viewed by 824 persons

An oxidation reduction reaction that is also a synthesis reaction

Asked by wiki @ in Chemistry viewed by 758 persons

Which of the following is true about subatomic particles

Asked by wiki @ in Chemistry viewed by 748 persons

Which of the following statements regarding electrical safety is correct

Asked by wiki @ in Chemistry viewed by 712 persons

The mass of 1.21 x10 20 atoms of sulfur is

Asked by wiki @ in Chemistry viewed by 683 persons

Calculate the mass of 3.05 buckets of golf balls answer

Asked by wiki @ in Chemistry viewed by 673 persons

What is the ph of a 1.2 m ch3nh3no3 solution

Asked by wiki @ in Chemistry viewed by 650 persons

A solution that contains 70g of nano3 at 30 c

Asked by wiki @ in Chemistry viewed by 628 persons

What is the electron pair geometry for c in cs2

Asked by wiki @ in Chemistry viewed by 619 persons

What is the uncertainty of a 50 ml graduated cylinder

Asked by wiki @ in Chemistry viewed by 619 persons