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A gas with initial volume of 2 X 10-6m3 is allowed to expand to six...

Physics
JAMB 2001

A gas with initial volume of 2 X 10-6m3 is allowed to expand to six times its initial value at constant pressure of 2 x 105Nm-2. The work done is?

  • A. 2.0J
  • B. 4. 0 J
  • C. 12.0 J
  • D. 2.4 J
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Correct Answer: Option A
Explanation

P = F/A => F = PA = PV/L

Volume V\(_2\) = 6 * 2 x 10\(^{-6}\)


W = PΔV =  2 x 10\(^5\) * (12 x 10\(^{-6}\) -  2 x 10\(^{-6}\))
= 2 x 10\(^5\)  10 x 10\(^{-6}\)
= 2.0J


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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995