Question

Question 38 3 pts Down at McMurdo Station in Antarctica, you are in charge of drinking water supplies. Every morning, you must melt 2500 gram block of H2O ice and raise it to normal drinking water temperature, 290 K. This morning, July 29, 2020, the ice block's temperature is 268. Calculate the total energy budget, in calories, that you need for this drinking water chore on 7/29/20. Type in your answer to the nearest calorie -- it's going to be a big number! E.g., if your answer is 848,922.73 calories, then type 848923 in the answer box.

Answer 1

in 3rd questions j rise temperature and k fall in temprature.

given mass of ice = 250gm & kg The 268k morning latent heat kg Specfic heat Capacity of water = 41 go J / kg specfic heat capacity of ice = 2100 J/kg of 29 of ice july ice temp 33 6x105 3.36x105 Tag oc ice ] → oc water 22c water Heat required to convert oc icet to o'c water = x 3.36x10= 8.4x0² J ML ML = Z 4 Heat = required to rice temp 268K to 2go= mc (T2-Ti) 4190 x 1 Ź ( 2go - 268) 4 4190 x L x 22 23045 J 4 O2 = 2.3045 X 104 J O2 O total = 2.3045 xott 8. 4x0 10.70 x 104 J 44 9589 Calorie Ototal o total