Question

Molar mass of ammonium nitrate (NH4NO3) ___80.04g/mol___ Mass of water __30.00 g_____

Mass of ammonium nitrate __3.930 g_______ Moles of ammonium nitrate .049mol

time	temperature, °C	time	temperature, °C	time, sec	temperature, °C
0 s	20.0	1 min 15 s	10.7	2 min 30 s	10.5
15 s	12.5	1 min 30 s	11.0	2 min 45 s	10.7
30 s	11.0	1 min 45 s	10.7	3 min	10.7
45 s	11.0	2 min	10.6	3 min 15 s	11.0
1 min	10.7	2 min 15 s	10.5	3 min 30 s	11.0

Temperature change __ -9 °C __ Joules of energy transferred _____ Heat of solution __________

Mass of ammonium nitrate ___4.640 g_____ Moles of ammonium nitrate ____.058mol____

time	temperature, °C	time	temperature, °C	time, sec	temperature, °C
0 s	20.0	1 min 15 s	12.0	2 min 30 s	11.0
15 s	14.0	1 min 30 s	11.0	2 min 45 s	11.0
30 s	12.0	1 min 45 s	11.0	3 min	11.0
45 s	11.5	2 min	11.0	3 min 15 s	11.0
1 min	11.5	2 min 15 s	11.0	3 min 30 s	10.5

Temperature change __-9.5 °C ___ Joules of energy transferred ___ Heat of solution _____

Answer 1

Here Joules of energy transformed = energy absorbed by zog water energy okosted 3-390g of operation Neocos energy absorbed by xog water = moss x speople hot x tempor efore choge = 300g x 4-186 7/je x que = 1130.22 Joules = mass chonga = 3.3909x 174 energy aksobed by 3370 g om moniem atrak = = mass x speeps heet x tempesekre chorga = 3-3909x 1-7405/gº2x que = 53.69 Joules Joules of energy transferred = 130:22 5 + 53.09 J = 1183.31 J Heat o solution Bar = 1183.315 it positive because the reachan is endothermic Heart of solution per mok of Ammoniom patrate = 163-375 , = 1183-315, Rr656 mol 0.019 mol = 24149.18 J/mol 220401.95/mol = 24.15 KJ/mol 2 20:40 kJ/mol

Similarly in second case Tooles of energy transfered = 4.640g * 1.440 3/4°C X 9.5 30-09 x 4.186J/gºc X9.5 z 12 69.71 J 1 = 1269171. J Heart of solofon = 1269-45 Hent of solution per nok al omonim nikake – 1269.85 0.058 moi 3 21891.54 J/mol = 21.89 KJ/mol
specific heat of ammonium nitrate and water will given inthe lab manual