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Question #f0c8e

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Answer 1 · 2014-12-03T06:54:20

You will need to use the combined gas law in order to answer this question. The combined gas law is represented by the following equation: $"P"_1"V"_1"/T"_1"$ = $"P"_2"V"_2"/T"_2"$ . $"STP"$ is $"273K"$ and $"760.0 mmHg"$ .

Given/Known :
$"P"_1$ = $"760.0 mmHg"$
$"V"_1$ = $"125 mL"$
$"T"_1$ = $"273K"$
$"P"_2$ = $"275 mmHg"$
$"V"_2$ = $"425 mL"$

Unknown:
$"T"_2"$

Equation:
$"P"_1"V"_1"/T"_1"$ = $"P"_2"V"_2"/T"_2"$

Solution: Rearrange the equation to isolate $"T"_2$ on one side. Then solve for $"T"_2$ .

$"T"_2$ = $"P"_2"V"_2"T"_1"/P"_1"V"_1$
$"T"_2$ = $"(275 mmHg)(425 mL)(273K)/(760.0 mmHg)(125 mL)"$
$"T"_2$ = $"336K"$

Convert $"T"_2$ from Kelvins to degrees Celsius .
$"336K - 273 = 63"^o"C"$

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