Which of the processes is exothermic?

1. evaporation of alcohol

2. sublimation of iodine

3. solidification of volcanic lava

4. burning of paper

I am so lost, and suggestions to how I can solve this? A sample of nickel (specific heat capacity 0.446J/goC) is heated to 255.5oC and placed in a coffee cup calorimeter containing 250.0 g of water at a temperature of 20.0oC.

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Which of the processes is exothermic? 1. evaporation of alcohol 2. sublimation of iodine 3. solidification of volcanic lava 4. burning of paper

The maximum amount of solute that dissolves in a given amount of solvent and forms a stable solution is called the

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Why is pure orange juice a mixture?