Question

Data Table 2: Caloric Calculations Walnut Marshmallow (Jumbo) Tortilla Chip Food Item Description: Mass of food, cup, and clip - initial (g) 5.98g 9.59 5.87 Mass of food, 5.49g 9.39 3.96 .49g .20g 1.91g took about little over a minute to catch on fire, small fi faster to catch fire, small flame but once put on paper fast to catch fire, big flame, and stayed on fire longer cup, and clip - final (g) Mass of burned food (g) Observations of Flame (intensity, length of time burning, etc.) Water temp initial °C Water temp - final °C 24 23 23 29 23 29

Answer 1

Walnut

Mass = 0.49 g

Cwater = 1 Cal/g degC

Temp Change = 5 deg C

Q = Mass * C* Temp Change

= 0.49 g * 1 Cal / g deg C * 5 deg C

= 2.45 Cal

= 0.00245 kCal

Energy released per grm = 0.00245 kCal / 0.49 g = 0.005 kCal/g

Marshmallow

Mass = 0.2 g

Cwater = 1 Cal/g degC

Temp Change = 0 deg C

Q = Mass * C* Temp Change

= 0.2 g * 1 Cal / g deg C * 0 deg C

= 0 kCal

Energy released per grm = 0 kCal/g

Chip

Mass = 1.19 g

Cwater = 1 Cal/g degC

Temp Change =6 deg C

Q = Mass * C* Temp Change

= 1.19 g * 1 Cal / g deg C * 6 deg C

= 7.14 Cal

= 0.00714 kCal

Energy released per grm = 0.00714 kCal / 1.19 g = 0.006 kCal/g