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Lena [83]
3 years ago
12

A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what i

s the pressure after the temperature change?
Chemistry
2 answers:
Alenkinab [10]3 years ago
8 0

Answer : The pressure after the temperature change is, 0.75 atm.

Solution :

According to the Gay-Lussac's Law, the pressure is directly proportional to the temperature of the gas at constant volume and number of moles.

P\propto T     (At constant volume and number of moles)

Or,

\frac{P_1}{P_2}=\frac{T_1}{T_2}

where,

P_1 = initial pressure = 0.82 atm

P_2 = final pressure = ?

T_1 = initial temperature = 21^oC=273+21=294K

T_2 = final temperature = -3.5^oC=273+(-3.5)=269.5K

Now put all the given values in the above formula, we get the final pressure of the gas.

\frac{0.82atm}{P_2}=\frac{294K}{269.5K}

P_2=0.75atm

Therefore, the pressure after the temperature change is, 0.75 atm

Damm [24]3 years ago
4 0

The correct answer is A 0.75 atm


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