Question

A pair of students found the temperature of 100. g of water to be 26.3°C. They then dissolved 7.15 g of LiBr in the water. When the salt had dissolved, the temperature of the water was 35.9°C. (a) Calculate ?T for the water. 9.6 °C (b) The dissolution was exothermic. (c) The water absorbed energy from the dissolution process. (d) Based on this observation alone, the entropy change cannot be determined. (e) Give the reaction for the dissolution of the salt in water. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) (f) When 7.15 grams of LiBr is dissolved, how many moles of cation are produced? mol How many moles of anion are produced? mol

          A pair of students found the temperature of 100. g of water to be 26.3°C. They then dissolved 7.15 g of LiBr in the water. When the salt had dissolved, the temperature of the water was 35.9°C.
(a) Calculate ?T for the water.
9.6 °C
(b) The dissolution was exothermic.
(c) The water absorbed energy from the dissolution process.
(d) Based on this observation alone, the entropy change cannot be determined.
(e) Give the reaction for the dissolution of the salt in water. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)
(f) When 7.15 grams of LiBr is dissolved, how many moles of cation are produced?
mol
How many moles of anion are produced?
mol

A pair of students found the temperature of 100. g of water to be 26.3°C. They then dissolved 7.15 g of LiBr in the water. When the salt had dissolved, the temperature of the water was 35.9°C.
(a) Calculate ?T for the water.
9.6 °C
(b) The dissolution was exothermic.
(c) The water absorbed energy from the dissolution process.
(d) Based on this observation alone, the entropy change cannot be determined.
(e) Give the reaction for the dissolution of the salt in water. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)
(f) When 7.15 grams of LiBr is dissolved, how many moles of cation are produced?
mol
How many moles of anion are produced?
mol

Added by Richard D.

Question

Please give Ace some feedback