What type if bonds hold two oxygens together to form O2 ?

Reaction enthalpy for ethanol oxidation, C2H5OH+3O2 -> 2CO2 + 3H2O is 1257 kJ/mole. Energy content per mol fuel ______kJ Ener

MArishka [77]

Answer:

Energy content per mol fuel 1257 kJ.

Energy content per gram fuel = 27.33 kJ

Energy released per mol carbon dioxide gas formed is 628.5 kJ

Energy released per mol oxygen gas consumed= 419 kJ

Moles of carbon dioxide gas formed per 1000 kJ energy released is 1.591.

Explanation:

$C_2H_5OH+3O_2\rightarrow 2CO_2 + 3H_2O,\Delta H= 1257 kJ/mol$

1) Energy released per mole or fuel that is ethanol :

$1mol \times 1257 kJ/mol=1257 kJ$

2) Mass of 1 mole of ethanol = 46 g

46 grams of ethanol produces 1257 kJ of energy

Energy content per gram fuel :

$\frac{1257 kJ}{46 g}=27.33 kJ/g$

3) Energy released when 2 moles of carbon dioxide are formed = 1257 kJ

Energy released per mol of carbon dioxide formed:

$\frac{1}{2}\times 1257 kJ/mol=628.5 kJ/mol$

4) Energy released when 3 moles of oxygen gas are consumed = 1257 kJ

Energy released per mol of oxygen gas consumed:

$\frac{1}{3}\times 1257 kJ/mol=419 kJ/mol$

5) Energy released when 2 moles of carbon dioxide are formed = 1257 kJ

Moles of carbon dioxide gas formed per kilo Joule of energy:

$\frac{2}{1257} mol$

Moles of carbon dioxide gas formed when 1000 kJ of heat is released:

$\frac{2}{1257} \times 1000 mol=1.591 mol$

5 0

4 years ago

A balloon is filled to a volume of 18.9L at a temperature of 27.1ºC. If the pressure in the balloon is measured to be 2.20 atm,

IrinaK [193]

Answer:

We have 1.69 moles of gas inside the balloon

Explanation:

Step 1: Data given

Volume of the balloon = 18.9 L

Temperature = 27.1 °C = 300.25 K

Pressure in the balloon = 2.20 atm

Step 2: Calculate the number of moles

p*V = n*R*T

n= (p*V)/(R*T)

⇒with n = the number of moles of gas

⇒with p = the pressure of gas = 2.20 atm

⇒with V = the volume of the gas = 18.9 L

⇒with R = the gas constant = 0.08206 L*atm/mol*K

⇒with T = the temperature = 27.1 °C = 300.25 K

n = (2.20 * 18.9) / ( 0.08206*300.25)

n = 1.69moles

We have 1.69 moles of gas inside the balloon

8 0

3 years ago

Which of the following statements best describes the relationship between elements and compounds? A. Atoms of more than one elem

joja [24]

The properties of elements are much different from the properties of the compounds that they make up.

6 0

4 years ago

Read 2 more answers

How are weather and climate different?

vichka [17]

$\bf{Hello!}$

Option 3 is your answer

Weather describes daily conditions and climate describes averages

Have a nice day!

8 0

3 years ago

Read 2 more answers

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I (s) ⇌ NH3 (g) + HI (g) At 400 ºC, Kp = 0.215. Calcul

ollegr [7]

Answer: The partial pressure of ammonia is 0.464 atm

Explanation:

For the given chemical equation:

$NH_4I(s)\rightleftharpoons NH_3(g)+HI(g)$

Initial: 1

At eqllm: 1-x x x

The expression for $K_p$ for the following equation is:

$K_p=p_{NH_3}\times p_{HI}$

The partial pressures of solids and liquids are taken as 1 in the equilibrium expression.

We are given:

$K_p=0.215$

Putting values in above equation, we get:

$0.215=x\times x\\\\x=0.464atm$

Hence, the partial pressure of ammonia is 0.464 atm

5 0

3 years ago

What type if bonds hold two oxygens together to form O2 ?​

What type if bonds hold two oxygens together to form O2 ?