nnDRnY LAB A $-$ BOMB CALORIMETRY

DRY LAB WORKSHEETS

Part $2-$ Analysis of an Unknown Sample

$T_{\text{c}\text{o}\text{m}\text{b}\text{u}\text{s}\text{t}\text{i}\text{a}\text{n}}=298K$

C$.$ for calorimeter provided $=9\mathrm{.}294,kJ*K^{-1}$

Reaction equation for the combustion of the unknown sample:

unkown $+n{O}_2(g)C{O}_2(g)+n+H_{2}O(l)$

Based on the stoichiometry of the above reaction, $n_{\text{e}\text{a}\text{s}}=0?$ moles

Weight of beaker $+$ pellet: $17\mathrm{.}053g$

Weight of empty beaker: $15\mathrm{.}988g$

Weight of pellet: $,1\mathrm{.}065g$

$T=T_{\text{f}\text{i}\text{n}\text{a}\text{l}}-T_{\text{i}\text{n}\text{i}\text{t}\text{i}\text{a}\text{l}\text{:}}23\mathrm{.}95-22\mathrm{.}12=1\mathrm{.}83$

Determine $H_{\text{c}\text{o}\text{m}\text{b}\text{u}\text{s}\text{t}\text{i}\text{o}\text{n}}$ for your sample in units of $kJ*g^{-1}.$