Answer to Question #172275 in General Chemistry for safdd

Question

Effect of temperature change

To see the effect of temperature changes (heat), place test tube #4 in a 250 mL beaker filled with ice and tap water. Place test tube #5 in a 250 mL beaker half-filled with water, and then heat the water to near boiling using a hot plate.

1. What do you observe happening to the solution in ice water? To the solution in hot water?
2. To see if equilibrium shifts are reversible, move test tube #4 from the ice water to the hot water and test tube #5 from the hot water to the ice water.
   
3. What do you observe happening? Report any color changes or other changes you observe.

Answer 1

1.Ice melts at a constant temperature of 0 °C. The amount of energy needed to melt 1 g of ice is called the heat of fusion. When measuring the heat of fusion of ice in a calorimeter, the heat lost by the water is

equal to the heat gained by the ice.

2.The change in the concentration of the reactant shifted the position of the equilibrium to counteract that change. The change in temperature of the reaction shifts the equilibrium to counteract that change.