Answer:
70.07 g
Explanation:
Data Given:
Amount of Heat release = 2.20 x 10⁴ J
initial temperature = 100 °C
Final temperature = 25 °C
Cs of water = 4.186 J/g °C
mass of water = ?
Solution:
Formula used
Q = Cs.m.ΔT
rearrange the above equation to calculate the mass of water sample
m = Q / Cs.ΔT .... . . . . . (1)
Where:
Q = amount of heat
As heat is released therefore Q will be negative
Q = -2.20 x 10⁴ J
Cs = specific heat of water = 4.186 J/g °C
m = mass
ΔT = (t2 - t1) = Change in temperature
First we have to find ΔT
ΔT = (t2 - t1)
ΔT = (25 °C - 100°C )
ΔT = -75 °C
Put values in above equation 1
m = - 2.20 x 10⁴ J / 4.186 J/g °C x -75 °C
m = - 2.20 x 10⁴ J / - 313.95 (J/g)
m = 70.07 g
So mass of water = 70.07 g
I think the answer b not sure
Answer: Energy stored in an object due to its position is Potential Energy. The energy that a moving object has due to its motion is Kinetic Energy. All forms of kinetic energy are the result of a previous state of potential energy. For example, the stored chemical potential energy of a battery converts to electrical kinetic energy to transport electricity to a light bulb, which radiates thermal kinetic energy. Potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.
When a conductor is connected between the electrodes, electrons collected from the transfer of ions in the cell<span> flow along the wire. Inside the </span>cell<span>, charge transport occurs when Matt metal ions flow from one electrode to the other.
Hope this helps.</span>