Q6. How much heat is required to raise \( 0.6 \, \text{kg} \) of water from \( 25^\circ \text{C} \) to \( 75^\circ \text{C} \) and then convert \( 0.4 \, \text{kg} \) of it to steam at \( 100^\circ \text{C} \) in a \( 0.1 \, \text{kg} \) copper calorimeter initially at \( 25^\circ \text{C} \)? (Specific heat of water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), copper = \( 386 \, \text{J kg}^{-1} \text{K}^{-1} \), latent heat of vaporization = \( 2.256 \times 10^6 \, \text{J kg}^{-1} \))A. 1090 kJB. 1092 kJC. 1093.67 kJD. 1095 kJ
Q7. What defines the triple point of a substance?A. Boiling and freezing occur togetherB. Only vapor existsC. Solid, liquid, and vapor coexistD. Liquid turns to solid instantly
Q8. A steel rod of length \( 50 \, \text{cm} \) at \( 20^\circ \text{C} \) is heated until its length increases by \( 0.03 \, \text{cm} \). What is the final temperature? (\( \alpha_l = 1.2 \times 10^{-5} \, \text{K}^{-1} \))A. 520°CB. 500°CC. 540°CD. 510°C
Q9. A steel sphere of radius \( 5 \, \text{cm} \) at \( 20^\circ \text{C} \) is heated to \( 120^\circ \text{C} \). What is the percentage increase in its volume? (\( \alpha_l = 1.2 \times 10^{-5} \, \text{K}^{-1} \))A. 0.35%B. 0.36%C. 0.37%D. 0.34%
Q10. Why does a metallic lid expand more than a glass jar when heated together?A. Metal has a higher coefficient of expansionB. Glass has higher densityC. Metal absorbs less heatD. Glass expands inward
Q1.Which temperature scale is based on the absolute minimum temperature where molecular activity theoretically ceases?A.KelvinB.CelsiusC.FahrenheitD.Rankine
Q2.A gas occupies 3 L3 \, \text{L}3L at 47∘C47^\circ \text{C}47∘C and 1.5 atm1.5 \, \text{atm}1.5atm. What will be its volume if the temperature drops to −23∘C-23^\circ \text{C}−23∘C and pressure increases to 3 atm3 \, \text{atm}3atm?A.1.2 LB.1.17 LC.1.3 LD.1.1 L
Q3.What determines the final temperature when two objects of different temperatures are mixed in a calorimeter?A.The volume of the objectsB.The pressure of the systemC.The material of the calorimeterD.Conservation of heat energy
Q4.A 0.5 kg0.5 \, \text{kg}0.5kg silver block at 240∘C240^\circ \text{C}240∘C is placed in 1.5 kg1.5 \, \text{kg}1.5kg water at 21∘C21^\circ \text{C}21∘C in a 0.25 kg0.25 \, \text{kg}0.25kg copper calorimeter at 21∘C21^\circ \text{C} 21∘C. What is the final temperature? (Specific heat of silver = 236 J kg−1K−1236 \, \text{J kg}^{-1} \text{K}^{-1} 236J kg−1K−1, water = 4186 J kg−1K−14186 \, \text{J kg}^{-1} \text{K}^{-1}4186J kg−1K−1, copper = 386 J kg−1K−1386 \, \text{J kg}^{-1} \text{K}^{-1}386J kg−1K−1)A.24°CB.25°CC.26°CD.23°C
Q5.A 0.1 kg0.1 \, \text{kg}0.1kg iron block at 200∘C200^\circ \text{C}200∘C is dropped into 0.4 kg0.4 \, \text{kg}0.4kg water at 30∘C30^\circ \text{C}30∘C in a 0.05 kg0.05 \, \text{kg}0.05kg copper calorimeter at 30∘C30^\circ \text{C} 30∘C. Find the final temperature. (Specific heat of iron = 450 J kg−1K−1450 \, \text{J kg}^{-1} \text{K}^{-1}450J kg−1K−1, water = 4186 J kg−1K−14186 \, \text{J kg}^{-1} \text{K}^{-1}4186J kg−1K−1, copper = 386 J kg−1K−1386 \, \text{J kg}^{-1} \text{K}^{-1} 386J kg−1K−1)A.34°CB.34.4°CC.35°CD.33°C