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ehidna [41]
3 years ago
13

When 2 moles of Na(s) react with H2O(l) to form NaOH(aq) and H2(g) according to the following equation, 369 kJ of energy are evo

lved. 2Na(s) + 2H2O(l)2NaOH(aq) + H2(g) Is this reaction endothermic or exothermic? What is the value of q? kJ g
Chemistry
1 answer:
enot [183]3 years ago
4 0

Answer:

Exothermic

q = -8.03 kJ/g

Explanation:

<em>When 2 moles of Na(s) react with H₂O(l) to form NaOH(aq) and H₂(g) according to the following equation, 369 kJ of energy are evolved.</em>

The thermochemical equation is:

2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g)    ΔH = -369 kJ

Since the energy is evolved, the reaction is exothermic, which is why the enthalpy of the reaction (ΔH) is negative.

The heat released (q) per gram of Na(s) is (molar mass 22.98 g/mol):

\frac{-369kJ}{2molNa} .\frac{1molNa}{22.98gNa} =-8.03kJ/g

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Which type of fermentation produces CO2 bubbles in baking?
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Alcoholic fermentation  fermentation produces CO2 bubbles in baking.

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What is the daughter nucleus (nuclide) produced when 90sr undergoes beta decay by emitting an electron? replace each question ma
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6 0
4 years ago
How many mililiters of a 6 00 M NaOH solution are needed to provide 0 330 mol of NaOH?​
Bumek [7]

Answer:

55mL of sodium hydroxide are required.

Explanation:

Given data:

Molarity of NaOH solution = 6.00 M

Number of moles of NaOH = 0.330

Volume required = ?

Solution:

Formula:

M = n/v

M = molarity

n = number of moles

v = volume

Now we will put the values in formula.

6.00 M = 0.330 mol / v

v = 0.330 mol / 6.00 M

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55mL of sodium hydroxide are required.

4 0
3 years ago
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