Answer:
Step-by-step explanation:
If 75 g of liquid water ( C = 4.18 j/g C ) in a calorimeter changes temperature from 25 C to 75 C, how much heat was transferred
2 answers:
Answer:
The heat transferred is 157 kJ.
Step-by-step explanation:
Given : If 75 g of liquid water ( C = 4.18 j/g C ) in a calorimeter changes temperature from 25 C to 75 C.
To find: How much heat was transferred ?
Solution :
Using the formula,
Where,
q - heat absorbed
c - the specific heat of the substance, in your case of water
ΔT - the change in temperature, as the difference between the final temperature and the initial temperature.
We have given,
c=4.18 j/g C
m=75 g
ΔT= 75 C-25 C=50 C
Substitute the values in the formula,
Therefore, The heat transferred is 157 kJ.
You might be interested in
Answer:
X''(2, -5), Y''(3, -3)
Step-by-step explanation:
You know that reflection in the x-axis changes the sign of the y-coordinate. Points that used to be above the axis are now below by the same amount, and vice versa.
Rotation counterclockwise by 270° is the same as clockwise rotation by 90°. That maps the coordinates like this:
(x, y) ⇒ (y, -x)
The two transformations together give you ...
(x, y) ⇒ (x, -y) ⇒ (-y, -x) . . . . . . . . equivalent to reflection across y=-x.
Using this mapping, we have ...
X(5, -2) ⇒ X''(2, -5)
Y(3, -3) ⇒ Y''(3, -3) . . . . . . on the equivalent line of reflection, so invariant
_____
The attachment shows the original segment in red, the reflected segment in purple, and the rotated segment in blue. The equivalent line of reflection is shown as a dashed green line.
