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

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.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.