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AlladinOne [14]
3 years ago
8

Diluting sulfuric acid with water is highly exothermic:

Chemistry
1 answer:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

The correct answer is 51.2 degree C.

Explanation:

The standard enthalpy for H₂SO₄ (l) is -814 kJ/mole and the standard enthalpy for H₂SO₄ (aq) is -909.3 kJ/mole.  

Now the dHreaction = dHf (product) - dHf (reactant)  

= -909.3 - (-814)

dHreaction or q = -95.3 kJ of energy will be used for dissociating one mole of H₂SO₄.  

The heat change in calorimetry can be determined by using the formula,  

q = mass * specific heat capacity * change in temperature -----------(i)

Based on the given information, the density of H₂SO₄ is 1.060 g/ml

The volume of H₂SO₄ is 1 Liter

Therefore, the mass of H₂SO₄ will be, density/Volume = 1.060 g/ml / 1 × 10⁻³ ml = 1060 grams

The initial temperature given is 25.2 degrees C, or 273+25.2 = 298.2 K, let us consider the final temperature to be T₂.  

ΔT = T₂ -T₁ = T₂ - 298.2 K

Now putting the values in equation (i) we get,  

95.3 kJ = 1060 grams × 3.458 j/gK (T₂ - 298.2 K) (the specific heat capacity of the final solution is 3.458 J/gK)

(T₂ - 298.2 K) = 95300 J / 1060 × 3.458 = 26 K

T₂ = 298.2 K + 26 K

T₂ = 324.2 K or 324.2 - 273 = 51.2 degree C.  

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abruzzese [7]

P waves move quickly and S waves move slowly through solids,

Explanation:

S and P waves can move through a solid material. P waves generally moves quickly and S-waves move slowly through solids.

S and P waves elastic seismic waves.

  • P waves are primary waves travels through any material medium. They move faster than S-waves.
  • S waves are secondary waves that moves through solid only. They are shear waves.
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At a seismic station, P waves arrives first because they have a higher velocity

Learn more:

Seismograph brainly.com/question/11292835

#learnwithBrainly

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3 years ago
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If i have a 50 L container that holds 45 moles of gas at a temperature of 473 K, what is the pressure inside the container?
Furkat [3]

Answer:

The pressure inside the container is 34.97 atm

Explanation:

Given:

V=50L R= 0.0821LatmK^-1mol^-1

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PV=nRT

P= nRT/V

= 45mol*0.0821Latmmol^-1K^-1*473K/ 50L

=34.95atm

6 0
3 years ago
Why does a gold isotope, with an atomic number of 79, require more neutrons to be stable than a sodium isotope, with an atomic n
Leya [2.2K]

Here’s a simplified explanation.

The <em>protons</em> in the nucleus <em>repel each other</em>. The <em>neutrons provide the “glue”</em> that holds the nucleus together and prevents it from flying apart.

The “glue” is the strong nuclear force. It is strong but extremely short range. It falls off extremely rapidly as the p-n distance increases.

A <em>neon atom</em> has 10 protons. There are three stable isotopes, with 10, 11, and 12 neutrons.

With fewer than 10 protons, the glue is not strong enough to hold the nucleus together.

If there are more than 12 neutrons, the average p-n distance is great enough that the glue has again become too weak.

<em>Gold</em> has one stable isotope. It contains 79 protons and 118 neutrons.

If there are fewer than 118 neutrons, the proton repulsions will be too strong for the strong force. If there are more than 118 neutrons, the average p-n distance will be large enough that the glue will again be too weak to hold the nucleus toge ther.

8 0
3 years ago
What is an atom? the smallest particle of matter a piece of an element the smallest molecule in the universe a combination of pr
pickupchik [31]
The answer for this question is the smallest particle of matter.
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3 years ago
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