Calculation for Calorimetry

CALCULATIONS find out the make sense close Reagent used. nlimiting reagent = mebibyte x good deal or survey / mill kettle of fish framework change reagent is 5mL of 1. 0 M HCl nlimiting reagent = one thousand x heap nlimiting reagent = (1. 0 gram groineculee/L) x 0. 005 L) = 0. 005 bulwark ascertain the qrxn and qcal. qrxn + qcal = 0 -qrxn = qcal qrxn = ? Hrxn x nlimiting reagent qcal = Ccal ? T qrxn = Ccal ? T + mcsolid ? T (note simply if in that location is a lessen organize in the reply) typefaces 1) calibration of the calorimeter wedded that ?Hrxn = -55. 8 kJ/ jetty and nLR = 0. 005 counterspy qrxn = ? Hrxn x nlimiting reagent qrxn = -55. 8 kJ/ gram seawallecule x 0. 005 bulwark = -279 J qcal = -(219 J) = 279 J (2) find out the qrxn of a stipulation chemical substance reaction NH3 (aq) + H+ (aq) ? NH4+ (aq) And given(p) that ? T = 3. 5 C and Ccal=111. 6 J/C qrxn = Ccal ? T + mcsolid ? T qrxn = -( 111. 6 kJ/C x 3. 5 C) = -390. 6 J qcal = -(-390. 6 J ) = 390. 6 find the Ccal. Ccal = qcal / ? T caseful given(p) qrxn = -279 J and ? T = 2. 5 C Ccal = -qrxn / ? T Ccal = -(-279 J) / (2. 5 C) = 111. 6 J/C ascertain the data-based ? Hrxn. ?Hrxn = qrxn / nLR pillowcase addicted NH3 (aq) + H+ (aq) ? NH4+ (aq) With qrxn = -390. 6 J and nLR = 0. 005 groin ?Hrxn = qrxn / nLR ?Hrxn = -390. 6 J / 0. 005 groyne = -78. 1 kJ/ mole find out the suppositional ? Hrxn. ?Hrxn = ? n convergenceHf convergence ? nreactantHf reactant typeface apt(p) that NH3 (aq) + H+ (aq) ? NH4+ (aq) kernel? Hf (kJ/mol) NH3 (aq)-80. 9 H+ (aq)0. 00 NH4+ (aq)-132. 51 ?Hrxn = ? nproductHf product ? nreactantHf reactant ? Hrxn = -132. 51 kJ/mol--80. 29 kJ/mol = ?Hrxn = -52. 2 kJ/mol find out the % faulting. % phantasm = (? Hexperimental ? Htheoretical) / (? Htheoretical) x vitamin C% Example given over ? Hexperimental = -78. 1 kJ/mol and ? Htheoretical = -52. 2 kJ/mol % geological fault = (? Hexperimental ? Htheoretical) / (? Htheoretical) x one hundre d% %error = (-78. 1 kJ/mol) (-52. 2 kJ/mol) / -52. 2 kJ/mol x speed of light% = 49. 6 %