A student was asked to prepare 2.5 L of a 3.5M CuSO4 solution (the molar mass of CuSO4 = 159.6060 g/mol). The student placed 400.0g of CuSO4 crystals in a 2.5 L (2500 mL) volumetric flask and filled it with water to the 2500-mL mark. the resulting solution was not 3.5M, it was only 1.0M. This means that the solution was too dilute. Did the student add too much CuSO4 or too little CuSO4?

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explanation:

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

the answer is c i took the test

explanation:

a