Question

Part A:

Use the References to access important values if needed for this question. Thermometer When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. Cardboard or Styrofoam lid In the laboratory a general chemistry student finds that when 2.79 g of NH_Cl(s) are dissolved in 106.00 g of water, the temperature of the solution drops from 23.17 to 21.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.76 J/°C. Nested Styrofoam cups Based on the student's observation, calculate the enthalpy of dissolution of NH4Cl(s) in kJ/mol. Assume the specific heat of the solution is equal to the specific heat of water. Reaction occurs in solution. AH dissolution = kJ/mol BL Submit Answer Retry Entire Group 9 more group attempts remaining

Part B:

Answer 1

HEAT MBSOR BEo DISSownon HEAT ABSORBEO By ColorON HEA BSORGED By CALORIMETR + Ce AT тсAт 836.2 J AH "DISSOWTtON (23.12- 21.31 106.00t a.1)3 4-18 O.052 mr (23-19-21-34)c 16.AJ mot 8 36. 2 J MASS oF Nu No. op moLEs op Ntu М of NAU 53.491 gme 0.052 moe

8) HEAT RELEASED HEA BSORBED R4 Soluno t HEAT ABSORBED By cloeImefe m CAT t Cae 4T 106.10+ .t0) a 4 -181 X d8.0-a5-17) 3636 6 J No. of mte oF Fehr ags.58 glmo = ০.০০৭ m৮২ AHoissolsTON 3636.63 0-009 moe -Yo4.1 kT moc MINUS SIGN NolcrES DISSownoN paoce Exo TtHERmC