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People Window Help aage × *Settings ×?Cengage signment/takeCovalentActivity.do?locator assignment-take ? ???36% Ct) Sun Apr 192624 PM a Use the References to access impertant valocs if needed for this question A sample of gaseous nitrogen is heated with an electrical coil. If 145 Joules the final temperature is 35.4°C, what is the initial temperature of the nitrogen? of energy are added to a 11.7 gram sample and Answer: C Submit Answer Retry Entire Group 9 more group attempts remaining Neat? Provos" 1 Fo

Explanation / Answer

Nitrogen is diatomic gas

Specific heat capacity of gas Cp = 3.5 x R = 3.5 x 8.314

= 29.099 J/mol·K

Energy balance equation

Q = n x Cp x (T2-T1)

145 J = 11.7 g x 1mol/28g x 29.099 J/mol·K x (35.4 - T1)

145 = 430.44 - 12.16 T1

T1 = 23.47°C

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