Chapter 3: Q.3.26 (page 73)

Convert each of the following energy units:
a. 8.1 kcal to cal
b. 325 J to KJ
c. 2550 cal to KJ
d. 2.5 kcal to J

Short Answer

Expert verified

(part a) $8100 c a l$

(part b) $0.325 k J$

(part c) $10.7 k J$

(part d ) $10460 J$

Step by step solution

(Part a) Step 1: Given Information

The given value is $8.1 k c a l$

To convert $8.1kcal to cal$ by the appropriate method

(Part a) Step 2: Explanation

For converting $8.1kcal$ to calories we have-

Using $1 kcal = 1000 cal$ ,

Hence for $8.1 k c a l$ , $8.1 k c a l$

localid="1654281933746" $= 8.1 \times 1000 = 8100 c a l$

(Part b) Step 3: Given Information

The given value is $325 J$

To convert $325 J tokJ$ by the appropriate method

(Part b) Step 4: Explanation

For converting $325 J tokJ$ we have-

Using, $1 kJ = 1000 J$

Hence for $325 J$ ,

$= \frac{325}{1000} = 0.325 k J$

(Part c ) Step 5: Given Information

The given value is $2550 c a l$

To convert $2550 cal tokJ$ by the appropriate method.

(Part c) Step 6: Given Information

For converting $2550 cal tokJ$ we have,

Using $1 kcal = 4.184 kJ$ and $1 kcal = 1000 cal$ ,

Hence for $2550 c a l$ ,

$= 2550 \times \frac{4.184}{1000} = 10.7 J$

(Part d) Step 7: Given Information

The given value is $2.5 kcal$

To convert $2.5 kcal to J$ using the appropriate method.

(Part d) Step 8: Given Information

For converting $2.5 kcal to J$ we have,

Using $1 kcal = 1000 cal$ and $1 cal = 4.184 J$ ,

Hence for $2.5 k c a l$ ,

$= 2.5 \times 4.184 \times 1000 = 10460 J$

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Convert each of the following energy units:
a. 8.1 kcal to cal
b. 325 J to KJ
c. 2550 cal to KJ
d. 2.5 kcal to J

Short Answer

Step by step solution

(Part a) Step 1: Given Information

(Part a) Step 2: Explanation

(Part b) Step 3: Given Information

(Part b) Step 4: Explanation

(Part c ) Step 5: Given Information

(Part c) Step 6: Given Information

(Part d) Step 7: Given Information

(Part d) Step 8: Given Information

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Convert each of the following energy units:a. 8.1 kcal to calb. 325 J to KJc. 2550 cal to KJd. 2.5 kcal to J

Short Answer

Step by step solution

(Part a) Step 1: Given Information

(Part a) Step 2: Explanation

(Part b) Step 3: Given Information

(Part b) Step 4: Explanation

(Part c ) Step 5: Given Information

(Part c) Step 6: Given Information

(Part d) Step 7: Given Information

(Part d) Step 8: Given Information

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Chemistry Branches

Inorganic Chemistry

Nuclear Chemistry

Ionic and Molecular Compounds

Physical Chemistry

Organic Chemistry

Study anywhere. Anytime. Across all devices.

Convert each of the following energy units:
a. 8.1 kcal to cal
b. 325 J to KJ
c. 2550 cal to KJ
d. 2.5 kcal to J