Answer
$-78^{\circ}C$
Work Step by Step
We find:
$\frac{V_{i}}{T_{i}}=\frac{V_{f}}{T_{f}}$ (constant n and P)
$\implies T_{f}=T_{i}(\frac{V_{f}}{V_{i}})=(20.0+273.15)\,K\times\frac{8.4\,mL}{12.6\,mL}=195\,K$
$=(195-273)^{\circ}C=-78^{\circ}C$
General Chemistry (4th Edition)
by McQuarrie, Donald A.
Published by
University Science Books
ISBN 10:
1891389602
ISBN 13:
978-1-89138-960-3
Chapter 13 Properties of Gases - Problems - Page 462: 10
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