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1. What is the enthalpy change when 0.025 kg of ice at 14°F is heated to become water at 120°F? Include a complete heating curve for this specific process. The specific heat of water is 4.184 J/g°C and for ice is 2.09 J/g°C. The heat fusion is 6.01 kJ/mol. Show all of your work, including units throughout the work. Report the final answer in the unit of kilojoule (kJ) and use the constants provided within this problem.

Your response must be at least 75 words in length.

2. Pick a substance (compound or mixture) and describe the intermolecular attractive interactions that exist between molecules or ions based on their composition and molecular structures. Also, explain why the substance does not have the other intermolecular forces. Your complete explanation should discuss all four intermolecular forces. Include a drawing of the Lewis structure with a detailed explanation of how that structure is obtained and relates to the four IMFs. Upload a picture of the drawing.

Your response must be at least 75 words in length.

 

3. On average, there are 62 different types of metal that go into the production of modern smartphones. Most of these metals are mined from third world countries, and some with very limited supplies. Identify one of these metals and discuss where that metal is sourced and the impacts to the planet regarding the mining of the metal. 

 Your initial post should be at least 200 words in length.