Question

Куску льда массой 4 кг при 00С сообщили энергию 1480 кДж. Какая установится окончательная температура?

Answer 1

что обозначает это * ^  напиши мне пожалуйста прошу скожи что это обозначает

Answer 2

плавление 4*333,55=1334,2

нагрев 4*4,2*T=145,8

T=8,68

Answer 3

Calculation of Final Temperature

To determine the final temperature of a 4 kg ice cube that absorbs 1480 kJ of energy at 0°C, we can use the equation:

Q = mcΔT

Where: - Q is the energy absorbed or released (in joules) - m is the mass of the substance (in kilograms) - c is the specific heat capacity of the substance (in J/kg°C) - ΔT is the change in temperature (in °C)

In this case, the ice cube is initially at 0°C, so the change in temperature is the final temperature minus 0°C. Let's assume the final temperature is T°C.

The specific heat capacity of ice is approximately 2.09 J/g°C, which is equivalent to 2090 J/kg°C.

Substituting the given values into the equation, we have:

1480 kJ = (4 kg) * (2090 J/kg°C) * (T°C - 0°C)

Simplifying the equation:

1480 kJ = 8360 T

Dividing both sides by 8360:

T = 1480 kJ / 8360

Calculating the result:

T ≈ 0.177°C

Therefore, the final temperature of the 4 kg ice cube after absorbing 1480 kJ of energy at 0°C is approximately 0.177°C.