THERMODYNAMICS: FIRST LAW

Multiple Choice

Calcium Chloride is mixed with water, resulting in a very hot solution.

• EXOTHERMIC

• ENDOTHERMIC

Multiple Choice

Lighting a candle

• EXOTHERMIC

• ENDOTHERMIC

Multiple Choice

Baking a bread

• EXOTHERMIC

• ENDOTHERMIC

Multiple Choice

Ammonium Nitrate is mixed in water, resulting in a very cold solution

• EXOTHERMIC

• ENDOTHERMIC

Multiple Choice

Burning a piece of paper.

• EXOTHERMIC

• ENDOTHERMIC

Draw

A gas in a closed container is heated, causing the lid of the container to rise. The gas performs 3J of work to raise the lid, such that is has a final total energy $$\Delta U$$ of 15J. How much heat energy was added to the system?

Draw

A gas in a closed container is heated with 50J of energy, causing the lid of the container to rise. If the change in energy of the system is 30J, how much work was done by the system?