At 373 K, a gaseous reaction A -2B + C is found to be first order. Starting with A , the total pressure at the end of 10 minutes was 176 mm and after a long time when A was completely dissociated, it was 270 mm. The pressure of A at the end of 10 minutes was
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Answer:
47mm of Hg
Explanation:
A→2B+C
att=0 x 0 0
att=10 x−y 2y y
total=x−y+2y+y
=x+2y=176mm-------(i)
att=100 0 2x x
total=2x+x=270mm
⇒3x=270
⇒x=90mmofHg
put the value of A in eq
n
(i), we get
x+2y=176
⇒90+2y=176
⇒2y=86
⇒y=43mmofHg
At the end of 10 min pessure of A is x−y=90−43=47mmofHg
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