Question

4. Sweat is the body's response to overheating. How does the evaporation of sweat cool the body?

 

5. Barium hydroxide and ammonium sulfate react in a beaker. The two powders melt and the beaker feels cold

a. Is this reaction endo or exothermic?

b. Why does the glass feel cold to the touch?

 

6. Weather reporters call rain and snow "precipitation." Doring precipitation. do the clouds absorb or release heat?

 

7. A sample of ice melts at .

a. Is beet released or absorbed by the ice?

b. What equation should be used to calculate q?

 

8. A sample of water at  is cooled to ice at  

3. Is heat released or absorbed by the water?

b. Hov many steps should be used to calculate the total heat?