A 655 G Sample of Aniline (C₆H₅NH₂,molar Mass = 93

question 51

Multiple Choice

A 6.55 g sample of aniline (C₆H₅NH₂,molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 14.25 kJ/°C.If the initial temperature was 32.9°C,use the information below to determine the value of the final temperature of the calorimeter. 4 C₆H₅NH₂(l) + 35 O₂(g) → 24 CO₂(g) + 14 H₂O(g) + 4 NO₂(g)
ΔH°_rxn = -1.28 × 10⁴ kJ

• A) 257°C
• B) 46.6°C
• C) 48.7°C
• D) 41.9°C
• E) 931°C

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Definitions:

Magnetic Resonance Imaging

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A noninvasive method of recording electrical activity of the brain using electrodes placed on the scalp.

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Electroencephalograph

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