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					Kcal homework
Solve


  Did you use the correct
  method to arrive at your
  answer?
1. Find the # of kcals in this food
 27 grams of      Answer:
  carbs            27 x 4 =108
 10 grams of       kcals
  fat              10 x 9 = 90
                    kcals
 4 grams of
  protein          4 x 4 = 16
                    kcals
                   214 kcals
2. Find the amount of kcals
for carbs & lipids
 5 grams of fat    Answer:
 11 grams of       9 x 5 = 45
  protein            kcals
 33 grams of       33 x 4 = 132
  carbs              kcals
                    177 kcals
3. Find the amount of kcals
 Starting temp    T x V =
  is 770C           calories
 Ending temp      V = 120ml
  is 2480C         171 x 120 =
 Answer:           20,520
 T =T2-T1        20, 520/1,000=
 T =248-77       20.52
 T = 1710C
4. Find the change in
temperature
 Starting temperature is 450C
 Ending temperature is 3130C
 T =T2-T1
 313 – 45 =
 2680C
5. Find the amount of fat
kcals in this product
 39 grams of carbohydrates
 12 grams of fat
 13 grams of protein
 12 x 9 =
 108 kcals
6. Find the amount of
calories
 Starting temp    T x V =
  is 800C           calories
 Ending temp      V = 120ml
  is 3300C         250 x 120 =
 Answer:          30,000
 T =T2-T1
 T =330 - 80
 T = 2500C
7. If a food has 7g of carbs, 4g of
protein and 3g of fat. How many
calories are in this food?

 7g x 4 kcal/g = 28 kcals

 4g x 4 kcal/g = 16 kcals

 3g x 9 kcal/g = 27 kcals

 71 kcals
8. When I burn the food, the water
temp rises from 70°C to 175°C.
What is ∆T?
 ∆T= T2 – T1
 ∆T= 175 – 70 = 105°C
9. Using your T from the previous
problem calculate the calories if you
used 10mL of water.

  T x V = calories

  105 ºC x 10mL = calories

  1,050 calories
10. Calculate your T and your amount of
calories. The water temperature raises
from 65 ºC to 185 ºC using 10mL of water.

  T x V = calories

  120 ºC x 10 mL =

  1200 calories
11. Find the kcals of each nutrient.
71g of carbs, 10g of fat and 5g of
protein.

  71g x 4 kcal/g =284 kcals of carbs

  10g x 9 kcal/g = 90 kcals of fat

  5g x 4 kcal/g = 20 kcals of protein
12. If you eat a product that contains
23g of carbs, 4g of protein and
5 grams of fat, how many total calories
will you consume?
   Carbs 23g x 4kcals = 92
   Protein 4g x 4kcals = 16
   Lipids 5g x 4kcals = 20
   128 kcals
13. If you eat a product that has 4g of fat,
7g of protein and 20g of carbs how many
total calories will you get from carbs and
protein?
   Carbs 20g x 4kcals = 80
   Protein 7g x 4kcals = 28
   Lipids 4g x 4kcals = 16
   124 kcals
14. If I started out with a temperature of
water of 35˚C and the ending temperature
is 54˚C what is my ΔT. Find my total
amount of calories if my volume is 30 mL.
 ΔT = 54 – 35 = 19
 19 x 30 = 570
15. If I start out with a temperature of
45˚C and ends with a temperature of
55˚C what is my change in
temperature?
 ΔT = 55 – 45 = 10
16. Food has 7g of carbs, 4g of
protein and 3g of fat. How many
calories are in this food?
   Carbs 7g x 4kcals = 28
   Protein 4g x 4kcals = 16
   Lipids 3g x 4kcals = 12
   56 kcals
17. If a food has 27g of carbs, 2g of
protein and 10g of fat. How many
calories are in this food?

  27g x 4 kcal/g = 108 kcals

  2g x 4 kcal/g = 8 kcals

  10g x 9 kcal/g = 90 kcals

  206 kcals
18. When I burn the food the
water temperature raises from
70C to 175º C. What is the T?
 ΔT = 175 – 70 = 5 º C
19. Using your T from the previous
problem calculate the calories if you
used 10mL of water.

 5 º C x 10ml = 50
20. Calculate your T and your amount of
calories. The water temperature raises
from 65 ºC to 185 ºC using 10mL of water.

 T = 185 – 65 = 20
 20 x 10ml = 200
21. Find the kcals of each
nutrient. 71g of carbs, 10g of fat
and 5g of protein.
 71g x 4 kcal/g = 284 kcals

 10g x 4 kcal/g = 40 kcals

 5g x 9 kcal/g = 45 kcals

 369 kcals
Make sure you know both
formula for calculating
calories!!!

				
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