Chemistry
posted by Mike on .
1)How many joules are needed to heat 8.50 grams of ice from 10.0 degrees to 25.0 degrees?
2)Calculate the hydronium ion concentration and the hydroxide ion concentration in blood, the pH of which is 7.3(slightly alkaline)

heat to move T of ice from 10 to zero is
q1 = mass x specific heat ice x delta T.
mass is 8.5 g, you can look up the specific heat of ice, and delta T is 0 (10) = 10.
Next we must melt the ice.
q2 = mass x heat fusion of ice.
Next we must move T of ice at 0 degrees C to 25 degrees C.
q3 = mass x specific heat water x delta T.
Total is q1 + q2 + q3.