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Allushta [10]
3 years ago
12

What is a common problem associated with nuclear power plants

Chemistry
1 answer:
Nuetrik [128]3 years ago
7 0
They explode and people die
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The overall reaction in a commercial heat pack can be represented as How much heat is released when 4.40 moles of iron are react
vodomira [7]

Answer:

Explanation:

The overall equation for this reaction can be represented as:4 Fe(s) + 3 O_{2(g) }  \to 2Fe_2O_{3(s)} \ \ \ \      \Delta H = -1652  \ kJ

The first question says:

How much heat is released when 4.40 moles of iron is reacted with excess O₂?

Suppose 1652 kJ of heat is being emitted into the surroundings when four(4) moles of Fe reacted with O₂, therefore;

4.40 moles of Fe reacts with:

=\dfrac{4.40 \ moles \times  1652 \ kJ}{4 \ moles}

= 1817.2 kJ of heat will be produced.

The second question says:

How much heat is released when 1.00 mole of Fe_2O_3 is produced?

Given that 1652 kJ of heat is being emitted into the surroundings when two(2) moles of Fe_2O_3 is produced, therefore;

1.00 moles of Fe_2O_3 reacts with:

=\dfrac{1.00 \ moles \times  1652 \ kJ}{2 \ moles}

= 826 kJ of heat will be produced.

To the third question; we have:

How much heat is released when 1.60 g iron is reacted with excess O₂?

We need to find the number of moles of iron first.

We know that number of moles = mass/molar mass

Thus, the molar mass of iron = 55.8 g/mol

number of moles of iron = (1.60g) / (55.8 g/mol)

number of moles of iron = 0.02867 mol

Thus; \dfrac{0.02867\  mol \times  1652 \ kJ }{4 \ mol}

= 11.84 kJ of heat is released.

The last question says:

How much heat is released when 11.8 g Fe and 1.20 g O₂ are reacted?

Again;

the number of moles of Fe = (11.8g) / (55.8 g/mol) = 0.2114 mole of Fe

Thus; \dfrac{0.2114\  mol \times  1652 \ kJ }{4 \ mol}

= 87.31 kJ of heat is released.

On the other hand,

the number of moles of O₂ = (1.20g) / (32 g/mol) = 0.0375 mol of O₂

Thus; \dfrac{0.0375\  mol \times  1652 \ kJ }{3 \ mol}

= 20.65 kJ of heat is released

Therefore, when these two(2) reactants reacted with each other, it is just the smaller amount of heat that would be released because oxygen tends to be the limiting reactant.

7 0
3 years ago
Please help, chemistry is kicking me!
Natali [406]

Answer:

Sorry I would bu that looks so hard

Explanation:

5 0
3 years ago
How many moles are there in 7.24 grams of calcium carbonate? With work shown
balu736 [363]

Answer:

0.0723371390261859

8 0
2 years ago
Read 2 more answers
What do you know about Relative Dating
gizmo_the_mogwai [7]
<span>it tells you the sequence in which events occurred, not how long ago they occurred.</span>
8 0
3 years ago
A container of argon with a volume of 22 ml has a pressure of 101.0 kPa.
Alexeev081 [22]

Answer:

The new pressure is 44.4 kPa.

Explanation:

We have,

Initial volume, V_1=22\ ml

Initial pressure, P_1= 101.0\ kPa

It is required to find the new pressure when the volume is increased to 50 ml. The relationship between pressure and volume is known as Boyle's law.

PV=k\\\\P_1V_1=P_2V_2

P_2 is final pressure

P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{22\times 101\times 10^3}{50}\\\\P_2=44440\ Pa\\\\P_2=44.4\ kPa

So, new pressure is 44.4 kPa.

6 0
3 years ago
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