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Author Question: Calculate the mass of sodium cyanate (NaOCN, molar mass = 65.0066 g mol-1) required to lower the ... (Read 973 times)

altibaby

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Question 1

Calculate the mass of NH4ClO4, molar mass = 117.49 g mol-1, required to create a temperature change of -1.0 °C in a coffee cup calorimeter containing 115 mL of water. The enthalpy of solution for NH4ClO4 is 33.47 kJ mol-1. The specific heat of water is 4.184 J g-1 °C-1, and assume the density of the solution is 1.00 g mL-1.
◦ 4.0 g
◦ 0.83 g
◦ 2.8 g
◦ 1.7 g
◦ 3.2 g

Question 2

Calculate the mass of sodium cyanate (NaOCN, molar mass = 65.0066 g mol-1) required to lower the temperature from 24.1 °C to 23.0 °C in a coffee cup calorimeter containing 98 mL of water. The enthalpy of solution for NaOCN is 19.20 kJ mol-1. The specific heat of water is 4.184 J g-1 °C-1 and assume the density of the solution is 1.00 g mL-1.
◦ 3.8 g
◦ 1.5 g
◦ 4.8 g
◦ 0.75 g
◦ 1.1 g


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Marked as best answer by altibaby on Nov 18, 2019

Koolkid240

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Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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