30ml of KMnO4 solution of concentration 0.02 mol/l is completely reduced by 20 ml of sodium oxalate solution 1. Calculate the concentration of the sodium oxalate used
2. Calculate the volume of gas released at S. T.P. conditions (Vm=24 l/mol)​

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.