Bay 101: Wetlands POST Lesson Review

Is the reaction between methane and oxygen endothermic or exothermic? Explain why we burn fossil fuels, such as natural gas.

vladimir1956 [14]

The thing that governs whether a reaction is exothermic is the energy given out / used up to break / form the bonds in the reaction.

<span>When two substances react, the bonds in those substances first break up, releasing energy, before re-forming in a different way, taking in energy. The nature of the bonds that are broken up and reformed determines whether more energy is given out (exothermic) or taken in (endothermic)</span>

6 0

4 years ago

The _____ has an oxygen atom single-bonded to hydrogen and single-bonded to a carbon-containing group.

Andrew [12]

The alcohol has an oxygen atom single-bonded to hydrogen and single-bonded to a carbon-containing group.

<h3>What is alcohol? </h3>

Alcohol is defined as the organic compound which is derived from an hydrocarbon by replacing one hydrogen by hydroxyl group(—OH).

The general formula of alcohol is ROH.

where, R is the alkyl group.

The first member of alcohol is ethanol.

<h3>Physical properties of alcohol</h3>

Alcohols are colourless.
They give a sweet smell except for glycerol and few lower alcohols.
They are flammable and produce a blue flame on burning.
They don't produce any kind of smoke while burning.
Alcohol are liquid at room temperature.

Thus, alcohol is an organic compound which contain an oxygen atom which is single-bonded to hydrogen and single-bonded to a carbon-containing group.

learn more about alcohol:

brainly.com/question/22875792

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6 0

2 years ago

How would you go about testing for the presence of SO4 2- in the presence of NO 3-?

Bas_tet [7]

Answer:

Test for sulphate ion present in a given salt: Add barium chloride solution. If white precipitate is formed, presence of SO42- ion is confirmed.

Explanation:

4 0

3 years ago

Read 2 more answers

Calculate ΔGrxn at 298 K under the conditions shown below for the following reaction.

algol13

Answer : The value of $\Delta G_{rxn}$ is -24.9 kJ/mol

Explanation :

First we have to calculate the value of 'Q'.

The given balanced chemical reaction is,

$Fe_2O_3(s)+3CO(g)\rightarrow 2Fe(s)+3CO_2(g)$

The expression for reaction quotient will be :

$Q=\frac{(p_{CO_2})^3}{(p_{CO})^3}$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

Now put all the given values in this expression, we get

$Q=\frac{(2.1)^3}{(1.4)^2}$

$Q=3.375$

Now we have to calculate the value of $\Delta G_{rxn}$ .

The formula used for $\Delta G_{rxn}$ is:

$\Delta G_{rxn}=\Delta G^o+RT\ln Q$ ............(1)

where,

$\Delta G_{rxn}$ = Gibbs free energy for the reaction = ?

$\Delta G_^o$ = standard Gibbs free energy = -28.0 kJ/mol

R = gas constant = $8.314\times 10^{-3}kJ/mole.K$

T = temperature = 298 K

Q = reaction quotient = 3.375

Now put all the given values in the above formula 1, we get:

$\Delta G_{rxn}=(-28.0kJ/mol)+[(8.314\times 10^{-3}kJ/mole.K)\times (298K)\times \ln (3.375)$

$\Delta G_{rxn}=-24.9kJ/mol$

Therefore, the value of $\Delta G_{rxn}$ is -24.9 kJ/mol

5 0

3 years ago

How does the equilibrium change to counter the removal of A in this reaction?

sattari [20]

Answer : The correct option for blank 1 is, Shifts left.

The correct option for blank 2 is, Reverse.

Explanation :

According to the Le Chatelier's Principle, when the addition of the reactant in reaction system then the equilibrium will shift to the right (forward) direction of the reaction.

Or, if we remove the reactants from the reaction system then the equilibrium will be shifted to the left (backward) direction of the reaction. And simultaneously, there will be increase in the reverse reaction for the attainment of the equilibrium.

5 0

4 years ago