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4 years ago

8

Hey there! so I have this question in chemistry where they have shown a reaction with Ammonia acid and HCL, so the question to e

xplain the kinetic particle theory.
The experiment, I'm in a hurry so pls be fast! Thanks a lot!!!

2 answers:

qaws [65]4 years ago

6 0

I’m a senior in college I haven’t even learned this yet

lozanna [386]4 years ago

5 0

What the I haven't even learned this yet

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Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca(OH)2(aq) + HCl(aq) CaCl2(

sesenic [268]

Ca(OH)2(aq) + 2HCl(aq)------> CaCl2(aq) + 2H2O(l) ΔH-?

CaO(s) + 2HCl(aq)-----> CaCl2(aq) + H2O(l), Δ<span>H = -186 kJ
</span>
CaO(s) + H2O(l) -----> Ca(OH)2(s), Δ<span>H = -65.1 kJ
</span>
1) Ca(OH)2 should be reactant, so
CaO(s) + H2O(l) -----> Ca(OH)2(s)
we are going to take as
Ca(OH)2(s)---->CaO(s) + H2O(l), and ΔH = 65.1 kJ

2) Add 2 following equations
Ca(OH)2(s)---->CaO(s) + H2O(l), and ΔH = 65.1 kJ
<span><u>CaO(s) + 2HCl(aq)-----> CaCl2(aq) + H2O(l), and ΔH = -186 kJ</u>

</span>Ca(OH)2(s)+CaO(s) + 2HCl(aq)--->CaO(s) + H2O(l)+CaCl2(aq) + H2O(l)

Ca(OH)2(s)+ 2HCl(aq)---> H2O(l)+CaCl2(aq) + H2O(l)
By addig these 2 equation, we got the equation that we are needed,
so to find enthalpy of the reaction, we need to add enthalpies of reactions we added.
ΔH=65.1 - 186 ≈ -121 kJ

4 0

4 years ago

Which planet has a distinctive red spot? A. Mercury B. Venus C. Jupiter D. Mars

Firdavs [7]

Jupiter------------------------

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3 years ago

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A ball has a mass of 140 g. What is the force needed to accelerate the ball at 25 m/s2? (Formula: F=ma) 3.5 N 115 N 165 N 4.5

Ksju [112]

<h3>Answer:</h3>

3.5 Newton

<h3>Explanation:</h3>

We are given;

Mass of the ball = 140 g

Acceleration = 25 m/s²

Required to find the force;

According to Newton's second law of motion, the resultant force on a body in motion and the rate of change in linear momentum are directly proportional.

That is; $F \alpha \frac{Mv-Mu}{t}$

Thus; F = ma , where F is the resultant force, m is the mass and a is the acceleration.

To get the force we substitute the value of m and a in the formula;

Therefore;

F = 0.14 kg × 25 m/s²

= 3.5 N

Hence, the force needed to accelerate the ball is 3.5 N

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3 years ago

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Energy Changes in Reactions

Zielflug [23.3K]

It would be 335 J and of energy is released

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3 years ago

Please explain how roasting a hot dog over a fire involves all three forms of heat transfer. Please use full sentences and corre

sergejj [24]

Ok so First of all we start with the fire. The fire gives off radiation because you can feel the heat through space. The fire also gives of conduction because you put the hotdog on the fire to cook it, and the hotdog will give off steam when it is hot causing it to give of Convection.

There is how cooking a hotdog over a fire uses all three heat transfer

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4 years ago