Heat water in a teakettle on the stove until it begins to boil. heat enough water to partially fill your mixing bowl. while the water in the kettle heats, place the small cup inside the mixing bowl. choose a heavy cup so it won’t float away when you add water to the container. after the water boils, turn off the stove’s burner. use an oven mitt to hold the teakettle, and carefully pour the hot water into the mixing bowl. be sure that no water goes into the small cup. place the tea kettle back on the stove to cool (turn off all burners). part a what change did you observe in the hot water when you poured it in the mixing bowl?

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The first law of thermodynamics states that the change in the internal energy of a system equals the net heat transfer into the system minus the net work done by the system. This is another way of saying that energy can neither be created nor destroyed, but it can be converted from one form to another form.  

A tea kettle that is warmed on an electric stove is receiving heat energy, this heat energy increases the kinetic energy of the water particles in the kettle and makes them to move faster. As time goes on, the water begins to turn into vapors. The heat energy that is released into the system is been used to carry out the work of evaporation and the whistling of the kettle.

Explanation:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-