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What is the standard enthalpy change for the transition of water from ice at -10°C to liquid water at 25°C? Provide the balanced chemical equation for this phase transition and use the appropriate values to calculate the standard enthalpy change.

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To calculate the standard enthalpy change for the transition of water from ice at -10C to liquid water at 25C, we need to consider three steps:1. Heating the ice from -10C to 0C2. Melting the ice at 0C3. Heating the liquid water from 0C to 25CThe balanced chemical equation for the phase transition is:H2O s  -> H2O l Step 1: Heating the ice from -10C to 0Cq1 = mcTwhere q1 is the heat required, m is the mass of water, c is the specific heat capacity of ice  2.09 J/gC , and T is the change in temperature  10C .q1 = m  2.09 J/gC  10CStep 2: Melting the ice at 0Cq2 = mHfuswhere q2 is the heat required and Hfus is the enthalpy of fusion for water  6.01 kJ/mol or 6.01 J/g .q2 = m  6.01 J/gStep 3: Heating the liquid water from 0C to 25Cq3 = mcTwhere q3 is the heat required, c is the specific heat capacity of liquid water  4.18 J/gC , and T is the change in temperature  25C .q3 = m  4.18 J/gC  25CThe total enthalpy change  q_total  is the sum of the enthalpy changes for each step:q_total = q1 + q2 + q3q_total = m   2.09 J/gC  10C  + m   6.01 J/g  + m   4.18 J/gC  25C Since we are looking for the standard enthalpy change, we can divide q_total by the mass  m  to get the enthalpy change per gram:H =  2.09 J/gC  10C  +  6.01 J/g  +  4.18 J/gC  25C H = 20.9 J/g + 6.01 J/g + 104.5 J/gH = 131.41 J/gSo, the standard enthalpy change for the transition of water from ice at -10C to liquid water at 25C is 131.41 J/g.

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