Describe the difference between an exothermic and endothermic process in terms of a chemical compound or reaction.

11. Which of the following hydrocarbons would you expect to have the highest boiling point?

vaieri [72.5K]

Ethane should be the answer!

4 0

3 years ago

How many grams of CO are needed to react with 1.68 mol of Fe2O3 ?

Keith_Richards [23]

Answer:

Iron (lll) oxide reacts with carbon monoxide according to the equation: Fe203(s) + 3 CO(g)-2Fe(s) + 3 CO2(g) A reaction mixture initially contains 22.55 g Fe203 and 14.78 g CO.

Explanation:

I hope this helps (:

4 0

3 years ago

Pls help, WILL MARK BRAINLIEST FOR THE CORRECT ANSWER!!!!

Nitella [24]

Answer:

The answer is D. Substances Y and Z would react to replace substance W, and the position of equilibrium would shift to the left.

Explanation:

PLZ BRAINLIEST'!!!

6 0

3 years ago

Read 2 more answers

Changes in temperature can often cause a change in the state of matter of objects. A decreasein temperature causes which of the

STALIN [3.7K]

Answer:

B. Water will freeze

because the latent heat of vapourization decreases.

5 0

3 years ago

For the following pair, indicate which element has the lower first ionization energy: Match the words in the left column to the

emmainna [20.7K]

Answer:

For 1: The correct answer is Ge.

For 2: The correct answer is Te.

For 3: The correct answer is Ba.

For 4: The correct answer is Ag.

Explanation:

Ionization energy is defined as the energy required to remove an electron from the outermost shell of an isolated gaseous atom. It is represented as $E_i$

$X(g)\rightarrow X^+(g)+1e^-;E_i$

Ionization energy increases as we move from left to right in a period. This happens because the atomic radius of an element decreases moving across a period, which increases the effective attraction between the negatively charged electrons and positively-charged nucleus. Hence, the removal of electron from the outermost shell becomes difficult and requires more energy.

Ionization energy decreases on moving from top to bottom in a group. This happens because the number of shells increases as we move down the group. The electrons get added in the new shell. So, the shielding of outermost electrons from the inner ones is more which decreases the attraction between the electrons and the nucleus. Hence, the removal of electron from the outermost shell becomes easy and requires less energy.

For the given options:

Option 1:

Chlorine is the 17th element of the periodic table belonging to Period 3 and Group 17.

Germanium is the 32nd element of the periodic table belonging to Period 4 and Group 14.

Hence, germanium will have smaller first ionization energy.

Option 2:

Tellurium is the 52nd element of the periodic table belonging to Period 5 and Group 16.

Selenium is the 34th element of the periodic table belonging to Period 4 and Group 16.

Hence, tellurium will have smaller first ionization energy.

Option 3:

Barium is the 56th element of the periodic table belonging to Period 6 and Group 2.

Titanium is the 22nd element of the periodic table belonging to Period 4 and Group 4.

Hence, barium will have smaller first ionization energy.

Option 4:

Copper is the 29th element of the periodic table belonging to Period 4 and Group 11.

Silver is the 47th element of the periodic table belonging to Period 5 and Group 11.

Hence, silver will have smaller first ionization energy.

5 0

3 years ago