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3 years ago

15

How does particle motion effect pressure

2 answers:

Alex3 years ago

8 0

The pressure is a result of the motion of particles

maksim [4K]3 years ago

4 0

Answer:

The pressure is a result of the motion of particles in the gas and is a measure of how many times the particles in the gas collide with each other and with the walls of the container. Temperature is a measure of the kinetic energy that the particles have.

Explanation:

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How does activation energy influence the rate of a chemical equation?

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How much heat is absorbed by 0.060 kg of copper when it is heated from 20.0°C to 80.0°C if the specific heat of copper is 385J/k

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3 years ago

A sample of milk kept at 25 °C is found to sour 40 times as rapidly as when it is kept at 4 °C. Estimate the activation energy f

irga5000 [103]

Answer:

120.575 kJ is the activation energy for the souring process.

Explanation:

The formula for an activation energy is given as:

$\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

$K_1$ = rate constant at $25^oC$ = $40k$

$K_2$ = rate constant at $4^oC$ = $k$

$Ea$ = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = $25^oC=273+25=298 K$

$T_2$ = final temperature = $4^oC=273+4=277 K$

Now put all the given values in this formula, we get:l

$\log (\frac{k}{40k})=\frac{Ea}{2.303\times 8.314 J/mol K}[\frac{1}{298K}-\frac{1}{277 K}]$

$E_a=120,575.61J=120.575 kJ$

120.575 kJ is the activation energy for the souring process.

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3 years ago