How to write equations and show units for the Total joules gained by water for the Pringle and the Total Joules per gram of food

Question

3 years ago

7

for the Pringle? (V. Calculations)

1 answer:

Paraphin [41] · Answer 1 · 2022-03-14T05:47:11+03:00

Answers:

1. 7500 J; 3800 J/g

Step-by-step explanation:

1. Joules gained by water

q = mcΔT

Data:

m = 100 g

C = 4.184 J·°C⁻¹g⁻¹

ΔT = 18 °C

Calculation:

q = 100 × 4.184 × 18 =7500 J

2. Joules per gram of Pringle

Energy gained by water = energy lost by Pringle

q = -mΔH

7500 J = -1.984 g × ΔH

ΔH = -7500 J/1.984 g = -3800 J/g

Pringles contain 3800 J of food energy per gram.