1. lodine-123 is used to study thyroid gland function. This radioactive isotope breaks down in a first-order process with a half life of 13.1 hr. What is the rate constant for for the process?

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.