Thermochemistry Question

Question

Inez convinces her brother Marcel to sign up for ballroom dancing. Due to their weight difference Inez will burn 325 Calories/hour, but Marcel will burn 449 Calories/hour. The class is composed of 10–3 minute sessions. Calculate the additional joules of energy Marcel will burn over his partner. Show your work...or not._

Answer 1

Hello, Nyles,

Inez = 325 Calories/hour

Marcel = 449 Calories/hour.

10–3 minute sessions make a total of 30 minutes, or 0.5 hour

Inez = (0.5 hour)*(325 Calories/hour) = 162.5 cal

Marcel = (0.5 hour)*(449 Calories/hour) = 224 cal

Additional energy Marcel burned over Inez = 61.5 cal

1 calorie = 4.184 Joules

(81.5 cal)*(4.184 J/1 cal) = 257 J

Bob