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genyjoannerubiera
05.10.2019 •
Chemistry
Agas at a fixed volume had a temperature change from 87.00 k to 65.25 k. at 65.25 k, the pressure was recorded as 18 pa. what was the initial pressure?
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Ответ:
The initial pressure was 25.2 Pa.
Explanation:
According to the Gay-Lussac's Law, the pressure of given amount of gas is directly proportional to the temperature in kelvin while volume is kept constant.
Formula:
P₁/T₁ =P₂/T₂
P₁ = Initial pressure
T₁ = Initial temperature
P₂ = Final pressure
T₂ = Final temperature
Given data:
T₁ = 87 K
T₂ = 62.25 K
P₂ = 18 Pa
P₁ = ?
Now we will put the values in formula,
P₁/T₁ = P₂/T₂
P₁ = P₂/T₂×T₁
P₁ = (18 Pa / 62.25 K) × 87 K
P₁ = 0.2892 Pa/k × 87 K
P₁ = 25.2 Pa
The initial pressure was 25.2 Pa.
Ответ:
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.