Q. 40 g of water. specific heat of water is 4.18 J/g*°C. temperature changes from 20° C to 25°C, how much heat energy (Q) moves from the water to the surroundings?

a

3,344 J

b

836 J

c

4,180 J

d

209 J

Question

Bria Chan

Chemistry

19 January, 16:24

Q. 40 g of water. specific heat of water is 4.18 J/g*°C. temperature changes from 20° C to 25°C, how much heat energy (Q) moves from the water to the surroundings?

a

3,344 J

b

836 J

c

4,180 J

d

209 J

+1

Answers (1)

Know the Answer?

Cecelia Griffith · Answer 1

The answer to your question is the letter b. Q = 836 J

Explanation:

Data

mass of water = 40 g

C = 4.18 J/g°C

Temperature 1 = 20°C

Temperature 2 = 25°C

Q = ?

Formula

Q = mC (T2 - T1)

Process

1. - To find the value of energy moved to the surroundings, just substitute the values in the formula and simplify.

Q = (40) (4.18) (25 - 20)

Q = (167.2) (5)

Q = 836 J

2. - Conclusion

The energy moved to the surroundings is 836 J.

Q. 40 g of water. specific heat of water is 4.18 J/g*°C. temperature changes from 20° C to 25°C, how much heat energy (Q) moves from the water to the surroundings?a3,344 Jb836 Jc4,180 Jd209 J

Q. 40 g of water. specific heat of water is 4.18 J/g*°C. temperature changes from 20° C to 25°C, how much heat energy (Q) moves from the water to the surroundings?

a

3,344 J

b

836 J

c

4,180 J

d

209 J