Endothermic reaction, find heat.

In summary, the conversation discusses a given chemical equation and the calculation of heat involved in a reaction. The answer is provided as 70,482 kj and the individual is unsure if it was calculated correctly. They also inquire about how to display small numbers for element quantities.
  • #1
davie08
115
0

Homework Statement


given:

2 H3PO4 + 3 Mg(OH)2 + 1427 kj → 6 H20 + Mg3(PO4)2

How much heat is involved if 927 grams of Mg(OH)2 reacts?


Homework Equations





The Attempt at a Solution



927 g x Mg(OH)2 mole/56.305g x 1427 kj/3Mg(OH)2 mole = 70,482 kj


I just felt like I did this wrong. Also how do I make the numbers small for showing the number of each element?
 
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  • #2
No idea where 1427 kj/3Mg(OH)2 mole came from - you have not listed it in the problem. It doesn't have to be wrong, it is just not clear if it is OK.

[noparse]H3O+[/noparse] renders as H3O+.
 

Related to Endothermic reaction, find heat.

What is an endothermic reaction?

An endothermic reaction is a chemical reaction that absorbs heat energy from its surroundings, resulting in a decrease in temperature.

What are some examples of endothermic reactions?

Some examples of endothermic reactions include melting ice, baking bread, and photosynthesis.

How do you determine the amount of heat absorbed in an endothermic reaction?

The amount of heat absorbed in an endothermic reaction can be determined by calculating the change in temperature of the reaction and using the specific heat capacity of the substances involved.

What factors can affect the heat absorbed in an endothermic reaction?

The heat absorbed in an endothermic reaction can be affected by factors such as the amount of reactants, the concentration of the reactants, and the presence of a catalyst.

How does an endothermic reaction differ from an exothermic reaction?

An endothermic reaction absorbs heat from its surroundings, resulting in a decrease in temperature, while an exothermic reaction releases heat to its surroundings, resulting in an increase in temperature.

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