Asmall puddle is frozen and its temperature is 0 oc. how much solar energy is needed to melt 10 kg of ice? now assume that the ice is originally at -20 oc, then how much energy is needed this time?

3758 kJ

Explanation:

Given:

Mass of the ice = 10 kg = 10 × 1000 = 10,000 g

Initial temperature of the ice = -20° C

Now,

The ice will start to melt when it will reach a temperature of 0° C

and, specific heat of ice, C = 2090 J/kg

Therefore,

Heat required to heat the ice from -20° C to 0° C

Q₁ = mCΔT

or

Q₁ = 10 × 2090 × (0 - (-20 ))

or

Q₁ = 418000 J

also,

Heat of fusion required to change the ice into liquid without any change in temperature.

For ice the heat of fusion = 334 J/g

Hence,

Energy needed by ice to melt, Q₂ = 334 × 10,000 J = 3,340,000 J

Hence, the total heat required = Q₁ + Q₂

= 418000 J + 3,340,000 J

= 3758000 J

= 3758 kJ

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;