Question

Ent //n Data and Calculations: Enter your experimental data and calculations in the data sheet below. g/mol Qmmonium g/mol B6.043 LLo. 95 Determination of the Heat of Solution Molecular weight of: NH.NO, (Salt A) CaCl (Salt B) 27 0 s): With NH4NO, With CaCl C Temperature of water before mixing (t (a) Temperature of solution after mixing: 10 100 110 90 120 80 70 60 5C 3C 40 20 Time (s) Salt A 841 35 8s 35 33 32 32 32582.5 3 Salt B (b) Record your data for each salt CaCl NH NO Mass of salt (g) Initial temperature (T) Final temperature (T) Change in temperature (AT) Heat of solution (AH) 27 27 20.5 Mol of salt AH/mol Is this a good candidate for hot pack or cold pack? Heat of solution: NH NOs kl/mol kl/mol Literature value Literature value kl/mol kJ/mol CaCla Percent error (Experimental Value- True Value) x 100 True Value Percentage error: NHaNO) CaCl Determination of Heat of Neutralization of an Acid with a Base Temperature of 2M HCl and 2M NaOH (should be the same) before mixing T. °C. Temperature after mixing 2M HCl solution with 2M NaOH solution: Time (s) 10 20 30 40 50 60 70 80 Temperature ("C) 90 120 46 40 40 100 110 Use Microsoft Excel to plot a graph of temperature (y-axis) against time (x-axis). 76 1NHNO aure (ATV a good k or cold eat of solu

Answer 1

Given data Miw NANO (A) =B0 0y 3/m ca clr 6) 110 98 9/.) T 27 Ti 27 C TfB35C fA 20.5 T AH Macs Watce provided Water voye Y Ad dou +apip 100 ml wadel assuming (Masc am Mass- Mw 99.8 gm Sp=0.004184 88.8 A x 0.004184 K x 45C DHA DHA . 8 8 KC x 8 99.2 2x - 3. 34 K1 (Releasi Had

nerd we fo K NO w e Salt jou mined 39NHu No MIxed* (Not 037S maled 3 Mo les(A 045mole 4ales (B) 1 f0 98 1.&2 NE AHA (K So-13 -3.39 -(04c4) from iteate 2 .47 AHA= - 22.9 01m-1 6140 50-13-2s-42 Per cent EroY A- 96-87 X1a= 2 5-49 82-9+74.2 X1wc10Y/ B- 82.9 have provided m 19 Mass 1 +hink gau for Salt A 13 to that 1 tham mear a gaul Expei met) foe Ctim dev ide Jut V aue What 37