Temperature change in Metals metal specific heat initial temperature final temperature copper 0.39 100°C 27°C aluminum 0.90 100°C 31°C Iron 0.45 100°C Three metal blocks of equal mass are placed in boiling water for several minutes. Each block is placed in a different insulated container with water in it. The equilibrium temperature for each sample is recorded. What is the best prediction for the missing value in the data table?

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.