Heat transfer

Heat transfer

1) What is the difference between the terms heat and temperature?

2) What is internal energy?

3) By what means can heat be transferred?

4) Two buckets contain milk at 15°C . One contains 1 kg of milk, the other contains 10 kg of milk. State and explain whether the following quantities are the same or different for the milk in the two buckets:

a. Internal energy

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b. Temperature

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c. Average energy of a molecule

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Thermal expansion

1) For gold α_V=4.2×10⁻⁵K⁻¹ . Calculate ΔV for an gold box with ¿10m^{3 , if the} temperature is increased by 2 K (Yes, it will only be a few cm³.)

2) Explain the anomaly of water. What is the temperature of the water at the bottom of a frozen lake?

Specific heat capacity

1) How much energy must be supplied to a 5 kg block of copper to increase its temperature from 20 °C to 40 °C? The specific heat capacity of copper is 385J

kg⋅K ^. 2) Explain what is meant by heat capacity

3) Calculate the energy needed to heat 5 kg of iron by 100 K. You can find the specific heat capacity of iron on page 68

Specific latent heat

1) ( /3 points) It takes 52 kJ to melt 500 g of silver. Calculate the latent heat (spezifische Schmelzenergie) of silver.

2) Sketch the (E,T)-diagram for lead.