Question

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

Answer 1

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

Step-by-step 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.