Enthalpy Change and Solution Properties

The video tutorial demonstrates the determination of the enthalpy change of solution by conducting an experiment using a cup calorimeter. It outlines the materials needed, including sodium hydroxide and water, and describes the setup of the calorimeter. The experiment involves measuring the mass of water and sodium hydroxide, observing the temperature change, and calculating the heat absorbed by the solution. The enthalpy change is calculated, showing that the process is exothermic. The video concludes with a definition of enthalpy change and links to related experiments.

What is the primary purpose of the experiment described in the video?

• To measure the enthalpy change of solution

• To determine the boiling point of water

• To calculate the density of sodium hydroxide

• To find the melting point of sodium hydroxide

Which material is used to coat the inside of the big cup in the calorimeter?

• Metal

• Wood

• Glass

• Polyester

What is the initial temperature of the water before adding sodium hydroxide?

• 35 degrees Celsius

• 30 degrees Celsius

• 25 degrees Celsius

• 20 degrees Celsius

How much sodium hydroxide is used in the experiment?

• 2.04 grams

• 4.04 grams

• 1.04 grams

• 3.04 grams

What is the total mass of the solution after adding sodium hydroxide?

• 103.05 grams

• 102.05 grams

• 101.05 grams

• 100.01 grams

What is the change in temperature observed in the solution?

• 6.3 degrees Celsius

• 5.3 degrees Celsius

• 4.3 degrees Celsius

• 7.3 degrees Celsius

What is the specific heat capacity of water used in the calculations?

• 6.18 Joule per Celsius gram

• 5.18 Joule per Celsius gram

• 4.18 Joule per Celsius gram

• 3.18 Joule per Celsius gram

How much heat is absorbed by the solution when 2.05 grams of sodium hydroxide is dissolved?

• 4260.8 joule

• 1260.8 joule

• 2260.8 joule

• 3260.8 joule

What is the enthalpy change of solution for one mole of sodium hydroxide?

• -64.3 kilojoule per mole

• -54.3 kilojoule per mole

• -44.3 kilojoule per mole

• -34.3 kilojoule per mole

What does the negative sign in the enthalpy change indicate?

• The reaction is endothermic

• The reaction is exothermic

• The reaction is neutral

• The reaction is reversible