How many kilocalories are lost when 874.3 grams of water cools from 84.81 celsius to 48.20 celsius?

32 kcal

Explanation:

Q= heat gained  or lost

m= mass of the substance = 874.3 g

c = heat capacity of  water = 1 cal/g ° C      

Q= 32008.1cal=32..0kcal    (1kcal=100cal)

Thus heat lost by 874.3 g of iron is = 32 kcal

Heat lost is represented as a negative sign.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.