Question

The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate:
2NH4Cl(s)+Ba(OH)2⋅8H2O(s)→2NH3(aq)+BaCl2(aq)+10H2O(l)
The ΔH for this reaction is 54.8 kJ . How much energy would be absorbed if 23.1 g of NH4Cl reacts?
Express your answer with the appropriate units.
energy absorbed= ???

Answer 1

Answer on Question #55676 – Chemistry - General chemistry

Question:

The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate:

$$2 \mathrm{NH_4Cl}(s) + \mathrm{Ba(OH)_2 \cdot 8H_2O}(s) \rightarrow 2 \mathrm{NH_3(aq)} + \mathrm{BaCl_2(aq)} + 10 \mathrm{H_2O}(l)$$

The $\Delta H$ for this reaction is $54.8\ \mathrm{kJ}$. How much energy would be absorbed if $23.1\ \mathrm{g}$ of $\mathrm{NH_4Cl}$ reacts?

Express your answer with the appropriate units.

energy absorbed = ???

Answer:

$$\Delta H = 23.1\ \mathrm{g} \cdot \frac{1\ \mathrm{mol}}{53.5\ \mathrm{g}} \cdot \frac{54.8\ \mathrm{kJ}}{2\ \mathrm{mol}} = 13.3\ \mathrm{kJ}$$

Energy absorbed = $13.3\ \mathrm{kJ}$

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