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NARA [144]
2 years ago
5

N2(g) + 3H2(g) → 2NH3(g)+ 22,000 cal

Chemistry
1 answer:
klemol [59]2 years ago
5 0
The reaction shows a exothermic reaction since it released an energy of 22,000 calories. An exothermic reaction is any reaction which a system releases energy into the surroundings. The opposite is called the endothermic reaction where the energy is being absorbed by the system while the reaction proceeds.
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3 years ago
24 g of magnesium were burned in oxygen. The compound formed had a mass of 40 g. Explain why the mass had gone up.
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Answer :

According to the law of conservation of mass, the mass of reactants must be equal to the mass of products.

The balanced chemical reaction is,

Mg+\frac{1}{2}O_2\rightarrow MgO

As we know that the molar mass of magnesium is 24 g/mole, the molar mass of O_2 is 32 g/mole and the molar mass of magnesium oxide is 40 g/mole.

From the given balanced reaction, we conclude that

As, 1 mole of magnesium react \frac{1}{2} mole of oxygen to give 1 mole of magnesium oxide.

So, the mass of Mg is 24 g, the mass of O_2=\frac{1}{2}\times 32=16g and the mass of MgO is 40 g.

That means 24 g of Mg react with 16 g O_2 to give 40 g of MgO.

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