the reaction of magnesium with hydrochloric acid carried out in a calorimeter caused the temperature of water to change from 25.0 Celsius to 36.0 Celsius. In this reaction 3760J of energy was released. What mass of water was present?

81.69g

Explanation:

Initial temperature (T1) = 25°C

Final Temperature (T2) = 36°C

Heat energy = 3760J

Specific heat capacity of water (c) = 4.184J/g°C

Mass (m) = ?

Heat energy = Mc∇T

Q = mc∇T = mc (T2 - T1)

3760 = m * 4.184 * (36 - 25)

3760 = 4.184m * 11

3760 = 46.024m

M = 3760 / 46.024

M = 81.69g

Mass of water is 81.69g