A sphere of 0.047 kg aluminium is placed for sufficient time in a vessel containing boiling water so that the sphere is at 100 °C. It is then immediately transferred to a 0.14 kg copper calorimeter containing 0.25 kg water at 20 °C. The temperature of water rises and attains a steady-state at 23 °C. The specific heat capacity of aluminium is:
(Given that: Specific heat capacity of copper calorimeter = and the specific heat capacity of water )
1.
2.
3.
4.
When \(0.15\) kg of ice at \(0^\circ \text{C}\) is mixed with \(0.30\) kg of water at \(50^\circ \text{C}\) in a container, the resulting temperature is \(6.7^\circ \text{C}.\)
The heat of fusion of ice is: (\(S_{\text{water}}=4186\) J kg–1 K–1)
1. \( 3.43 \times 10^4\) Jkg–1
2. \( 3.34 \times 10^4\) Jkg–1
3. \( 3.34 \times 10^5\) Jkg–1
4. \(4.34 \times 10^5\) Jkg–1
The heat required to convert 3 kg of ice at –12 °C kept in a calorimeter to steam at 100 °C at atmospheric pressure is:
(Given, the specific heat capacity of ice = , the specific heat capacity of water = , the latent heat of fusion of ice =
and the latent heat of steam = .)
1.
2.
3.
4.