When 1.0 mole of MgSO4 is dissolved in water contained in a calorimeter, the temperature of the water and dissolved ions increases.

When 1.0 mole of MgSO4 is dissolved in water contained in a calorimeter, the temperature of the water and dissolved ions increases. Therefore the sign of ΔH for the reaction is___________ , heat is transferred __________ the system __________ the surroundings, and the reaction is classified as ________.

Fill in the blanks with the following words:

• From
• positive
• negative
• endothermic
• to
• exothermic