Essay About Heat Energy And Work Area

Science Lab Safety Reinforcement Agreement
Science Lab Safety Reinforcement Agreement
Any type of science experimentation involves potential hazards and unforeseen risks may exist. The need
to prevent injuries and accidents cannot be over-emphasized! Use of this lab manual and any LabPaq are
expressly conditioned upon the student agreeing to follow all safety precautions and accept full
responsibility for his or her own actions. Study the safety section of the manual until you can honestly state
the following:
_Before beginning an experiment I will first read all directions and then assemble and organize all required
equipment and supplies.
_I will select a work area that is inaccessible to children and pets while experiments are in progress. I will
not leave experiments unattended and I will not leave my work area while chemical equipment is set up
unless the room will be locked.
35. Heat energy is taken away from the water, so the change in entropy will be negative. The heat
transfer is the mass of the steam times the latent heat of vaporization.
vap 3 0.25 kg 22.6 10 J kg
1.5 10 J K
273 100 K
36. The heat added to the water is found from Q mc T . Use the average temperature of 50oC in the
approximate entropy calculation.