calorimetry numerical

Calorimetry Numerical Question: 13 [ Reference: Selina Class 10 ICSE physics book exercise] 1.0 kg of water is contained in a 1.25 kW kettle. Calculate the time taken for the temperature of water to rise from 25° C to its boiling point 100° C. Specific heat capacity of water = 4.2 J g-1 K-1. Solution: Specific […]

Calorimetry numerical Question: 12 [Reference Selina ICSE class 10 book exercise] The temperature of 600 g of cold water rises by 15o C when 300 g of hot water at 50o C is added to it. What was the initial temperature of the cold water? Solution: Mass of hot water (m1) = 300 g Initial Temperature of […]

Calorimetry numerical Question: 11 [reference: Selina class 10 ICSE book exercise] 200 g of hot water at 80o C is added to 300 g of cold water at 10oC. Neglecting the heat taken by the container, calculate the final temperature of the mixture of water. Specific heat capacity of water = 4200 J kg-1 K-1. Solution: Mass […]

Calorimetry Numerical Question: 10 [from Selina ICSE class 10 Physics book exercise] 45 g of water at 50o C in a beaker is cooled when 50 g of copper at 18oC is added to it. The contents are stirred till a final constant temperature is reached. Calculate the final temperature. The specific heat capacity of copper […]

Calorimetry numerical Question: 9 [reference: Selina ICSE class 10 Physics] A mass of 50 g of a certain metal at 150° C is immersed in 100 g of water at 11° C. The final temperature is 20° C. Calculate the specific heat capacity of the metal. Assume that the specific heat capacity of water is 4.2 J g-1 K-1. […]

Calorimetry Numerical Question: 8 [reference: Selina ICSE class 10 Physics] 0.5 kg of lemon squash at 30o C is placed in a refrigerator which can remove heat at an average rate of 30 J s-1. How long will it take to cool the lemon squash to 5o C? Specific heat capacity of squash = 4200 J kg-1 K-1. […]

Calorimetry numerical Question: 7 [reference: Selina class 10 ICSE Physics] An electric heater of power 600 W raises the temperature of 4.0 kg of a liquid from 10.00C to 15.00C in 100 s. Calculate:(i) the heat capacity of 4.0 kg of liquid, and (ii) the specific heat capacity of liquid Solution: Power of heater P […]

Calorimetry numerical Question: 6 [ref: Selina ICSE class 10] Find the time taken by a 500 W  heater to raise the temperature of 50 kg of material of specific heat capacity 960 J kg-1 K-1, from 18oC to 38oC. Assume that all the heat energy supplied by heater is given to the material. Solution: Specific heat […]

Calorimetry Numerical Question: 5 1300 J of heat energy is supplied to raise the temperature of 0.5 kg of lead from 20oC to 40oC. Calculate the specific heat capacity of lead. Solution: Given Heat energy supplied = 1300 J Mass of lead = 0.5 kg Change in temperature = (40 – 20)0 C = 200 C = […]

Question: 4 Calculate the amount of heat energy required to raise the temperature of 100 g of copper from 20oC to 70oC. Specific heat capacity of copper =390 J kg-1 K-1. Solution: Given Mass of copper m = 100 g = 0.1 kg Change of temperature △t = (70 – 20)0 C = 500 C = 50 K […]

Question: 3 A piece of iron of mass 2.0 kg has a heat capacity of 966 J K-1. Find(i) Heat energy needed to warm it by 15oC, and(ii) Its specific heat capacity in S.I unit. Solution: (i) We know that, Heat energy needed to raise the temperature by 150 C = heat capacity × change in temperature Heat […]

Question: 2 (a)Calculate the heat capacity of a copper vessel of mass 150 g if the specific heat capacity of copper is 410 J kg-1 K-1. (b)How much heat energy will be required to increase the temperature of the vessel in part (a) from 25oC to 35oC? Solution: (a) Given Mass of copper vessel = 150 […]

Question: 1 By imparting heat to a body, its temperature rises by 150C. What is the corresponding rise in temperature on the Kelvin scale? Solution: The size of 1 degree on the Kelvin scale is the same as the size of 1 degree on the Celsius scale. Hence, on both the Kelvin and Celsius scales […]