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frez [133]
3 years ago
5

A 400 ml sample of gas is heated from -20 c to 60

Chemistry
2 answers:
Viktor [21]3 years ago
6 0
Using p1v1/t1=p2v2/t2
p1=50
p2=225
v1=400ml
v2=?
t1=-20=253k
t2=60=333k
50x400/253=225xv2/333
7.9=0.7xv2
v2=7.9/0.7
v2=11.3ml
ZanzabumX [31]3 years ago
5 0

Answer : The new volume of gas will be 117 ml.

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 50 kPa

P_2 = final pressure of gas = 225 kPa

V_1 = initial volume of gas = 400 ml

V_2 = final volume of gas = ?

T_1 = initial temperature of gas = -20^0C=(-20+273)K=253K

T_2 = final temperature of gas =  60^0C=(60+273)K=333K

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

\frac{50\times 400}{253K}=\frac{225\times V_2}{333K}

V_2=117ml

Therefore, the new volume of gas will be 117 ml.

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