343 LATENT AND SPECIFIC HEAT. 



water at 0C., and the temperature of the mixture was 0.634C. 

 Calculate the specific heat of mercury. 



3. What weight of water at 85 C. will just melt 15 pounds of 

 iceatOC.? 



4. What weight of water at 95 C. will just melt 10 pounds of ice 

 at -10 C.? 



5. What weight of steam at 125' C. will melt 5 pounds of ice at 

 8 C. and warm the water to 25 C. ? 



6. How much mercury could be wanned from 10 C. to 20 C. by 

 1 kilogram of steam at 200 C. ? 



7. Equal masses of ice at C. and hot water are mixed. The ice 

 is melted and the temperature of the mixture is C. What was 

 the temperature of the water ? 



8. Ice at C. is mixed with ten tunes its weight of water at 

 20 C. Find the temperature of the mixture. Ans. 11 C. nearly. 



9. One pound of ice at C. is placed in 5 pounds of water at 

 12 C. What will be the result ? 



10. Find the temperature obtained by condensing 10 g. of steam 

 at 100 C. in 1 Kg. of water at C. 



11. A gram of steam at 100 C. is condensed in 10 grams of water 

 t C. Find the resulting temperature. Ans. 58 C. nearly. 



12. If 200 #. of iron at 300 C. be plunged into 1 Eg. of water at 

 0C., what will be the resulting temperature ? 



13. Find the specific heat of a substance, 80 g. of which at 100 C. 

 being immersed in 200 g. of water at 10 gives a temperature of 

 20 C. 



14. If 800 #. of copper at 100 C. be immersed in TOO/;, of alcohol 

 at C., what will be the resulting temperature ? ( 535.) 



15. What will be the result of mixing 5 ounces of snow at C. 

 with 23 ounces of water at 20 C. ? 



16. A pound of wet snow mixed with 5 pounds of water at 20 C. 

 yields 6 pounds of water at 10 C. Find the proportions of snow 

 and water in the wet snow. 



17. What weight of mercury at C. will be raised one degree 

 by dropping into it 150 g. of lead at 400 C. ? 



18. Find the result of mixing 6 pounds of snow r*t C. with 

 7 pounds of water at 50 C. 



Recapitulation. In this section we have considered 

 the definition of Thermal Units; two Varieties 

 of Molecular Energy ; their mutual Converti- 

 bility ; the definition of Latent Heat; the latent 



