Why is respiration considered an exothermic reaction ? Explain.

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1. Chemical Reactions and Equations

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Why is respiration considered an exothermic reaction ? Explain.

Option A

Option B

Option C

Option D

Solution

Energy is required to support life. Energy in our body is obtained from the food we eat. During digestion, large molecules of food are broken down the cells and provides energy. The special name of this combustion reaction is respiration. Since energy is released in the whole process, it is an exothermic process.

$\underset{Glucose}{\mathop{{{C}_{6}}{{H}_{12}}{{O}_{6(aq)}}}}\,+\underset{~Oxygen~}{\mathop{6{{O}_{2(g)}}}}\,\to \underset{Carbon\text{ }dioxide}{\mathop{6C{{O}_{2(g)}}}}\,+\underset{Water}{\mathop{6{{H}_{2}}{{O}_{(l)}}}}\,$ $+$ Energy

Standard 10

Science

Balance the following chemical equations.

$(a)$ $HNO _{3}+ Ca ( OH )_{2} \longrightarrow Ca \left( NO _{3}\right)_{2}+ H _{2} O$

$(b)$ $NaOH + H _{2} SO _{4} \longrightarrow Na _{2} SO _{4}+ H _{2} O$

$(c)$ $NaCl + AgNO _{3} \longrightarrow AgCl + NaNO _{3}$

$(d)$ $BaCl _{2}+ H _{2} SO _{4} \longrightarrow BaSO _{4}+ HCl$

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Write the balanced equation for the following chemical reactions.

$(i)$ Hydrogen $+$ Chlorine $\to $ Hydrogen chloride

$(ii)$ Barium chloride $+$ Aluminium sulphate $\to $ Barium sulphate $+$ Aluminium chloride

$(iii)$ Sodium $+$ Water $\to $ Sodium hydroxide $+$ Hydrogen

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In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.

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Oil and fat containing food items are flushed with nitrogen. Why ?

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What is a balanced chemical equation ? Why should chemical equations be balanced ?

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Why is respiration considered an exothermic reaction ? Explain.

Solution

Similar Questions

Write the balanced equation for the following chemical reactions. $(i)$ Hydrogen $+$ Chlorine $\to $ Hydrogen chloride $(ii)$ Barium chloride $+$ Aluminium sulphate $\to $ Barium sulphate $+$ Aluminium chloride $(iii)$ Sodium $+$ Water $\to $ Sodium hydroxide $+$ Hydrogen

In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.

Oil and fat containing food items are flushed with nitrogen. Why ?

What is a balanced chemical equation ? Why should chemical equations be balanced ?

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Write the balanced equation for the following chemical reactions.

$(i)$ Hydrogen $+$ Chlorine $\to $ Hydrogen chloride

$(ii)$ Barium chloride $+$ Aluminium sulphate $\to $ Barium sulphate $+$ Aluminium chloride

$(iii)$ Sodium $+$ Water $\to $ Sodium hydroxide $+$ Hydrogen