Hi! Can someone help me solve all these questions relating to Specific heat capacity and energy? Thanks a lot. 1. Calculate the heat energy, in kJ, needed to increase the temperature of 3.0L of water from 25 degrees celcius to 100 degrees celcius.

2. Calculate the increase in temperature that will occur when 5.0 kJ of energy is added to 200mL of water.

3. Calculate the mass of water that can be heated from 10 degrees celcius to 35 degrees celcius by the addition of 1000 J of energy.

4. Calculate the heat energy, in kJ required to evaporate 50.0g of water at 100 degrees celcius.

5. Calculate the heat energy, in kJ, required to melt 1.0kg of ice at 0 degrees celcius.

6. Calculate the mass of water, in g, that can be evaporated at 100 degrees celcius by the addition of 3500 kJ

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

answer: i dont know the answer but this might

explanation:

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