In the reaction between strong acid and strong base, 1.8 g of water is formed. The heat evolved is used to raise the temperature of one kg of water at 25^@C. What is the final temperature of water?

In the reaction between strong acid and strong base, 1.8 g of water is

1.	In the reaction between strong acid and strong base, 1.8 g of water is formed. The heat evolved is used to raise the temperature of one kg of water at 25^@C. What is the final temperature of water?
Answer» Solution :Number of moles of water formed `= ("WEIGHT of water")/("gram molecular weight") = (1.8)/18 = 0.1` Heat liberated `= 13.7 xx 0.1 = 1.37 K`. Cal. Heat (q) is given as, `q = ms q 1.37 xx 1000 = 1000 xx 1 xx q`. The RISE in temperature of water `q = 1.37^@`. Final temperature of water = `25 + 1.37^@ = 26.37^@C`