All categories

3 years ago

How many kilojoules are released when 2.25 mol of H2O2 reacts?

Chemistry

1 answer:

Stels [109]3 years ago

8 0

Answer:

230.3 kJ

Some chemical reactions show release of heat while some show absorption of heat. On these bases, the reaction is classified as either endothermic or exothermic. Negative sign of ΔH means exothermic reaction.

You might be interested in

Convert 49 lbs into grams

lukranit [14]

<h2>Answer:</h2><h3>22226.026 g</h3><h2>Explanation:</h2>

To get an approximate result, multiply the mass value by 454.

3 0

3 years ago

In the first propagation step of the bromination of 2,3-dimethylbutane, the newly formed Br radicals react with the molecules of

Bess [88]

Answer:

See explanation

Explanation:

When the bromine free radical attacks 2,3-dimethylbutane, two free radicals may result. One of them is primary (formed by attack on then end -CH3 group) the other is secondary.

Recall that the order of stability of free radicals is tertiary > secondary > primary > methyl.

Hence the secondary free radical is more thermodynamically stable hence it is the major free radical formed in the first propagation step.

8 0

3 years ago

Which of the following is a definition of an acid? O a. releases heat when dissolved in water. O b. turns cloudy when dissolved

adell [148]

Answer: Option (d) is the correct answer.

Explanation:

According to Bronsted-Lowry an acid is defined as the specie which is able to donate hydrogen ions when dissolved in water.

For example, $HCl \rightarrow H^{+} + Cl^{-}$

On the other hand, bases are the species which are able to donate hydroxide ions when dissolved in water.

For example, $NaOH \rightarrow Na^{+} + OH^{-}$

Thus, we can conclude that a definition of an acid is that it donates H ions when dissolved in water.

4 0

3 years ago

Before a bond breaks in a chemical reaction, what happens

nataly862011 [7]

Energy is being released

3 0

3 years ago

Read 2 more answers

What is the volume, in ml, of 0.183 mol NH3? (at STP).

Tems11 [23]

The volume of ammonia gas is 4096 mL.

Explanation:

As per the kinetic theory of gases, the volume occupied by gas molecules will be directly proportional to the temperature and number of moles of the gas molecules. Similarly, the volume occupied by gas molecules will be inversely proportional to pressure.

PV = nRT

So, V = nRT/P

As R = 0.082 L atm mol⁻¹ K⁻¹ , T = 273 K and P = 1 atm with n = 0.183 mol

Then,

V=(0.183*0.082*273)/1

V = 4.096 L = 4096 mL.

Thus, the volume of ammonia gas is 4096 mL.

5 0

3 years ago

Read 2 more answers