heat capacity

What is the quantity of heat required to raise the temperature of a substance by one degree?

• Mass of the substance

• Specific heat capacity of the substance

• Heat capacity

• Change in temperature

What is the unit of specific heat capacity?

• Joules

• Joules/K

• JKgK

• JKg-1K-1

How can specific heat capacity be determined?

• By observing the color of the substance

• By counting the number of particles in the substance

• By using the method of mixtures or the electrical method

• By measuring the volume of the substance

What is the equation to calculate the specific heat capacity of a substance using the method of mixtures?

• IVt=MCbΔθ

• Q=MCΔ θ

• MsCs(θ2- θ3) = McCc(θ3- θ1) + (Mcw-Mc) Cw (θ3- θ1)

• Q=mcΔθ

What is the specific heat capacity of lead if 250g of lead at 170°C is dropped into 100g of water at 0°C and the final steady temperature is 12°C? (Cw = 4.2 x 10^3 Jkg-1k-1)

• 50 J/kgk

• 100 J/kgk

• 250 J/kgk

• 127.6 J/kgk

What is the change in temperature of a quantity of water that falls from the top to the bottom of a 630m high waterfall? (Neglect heat lost to the surroundings, take acceleration due to gravity as 10ms-2 and Specific capacity of water as 4200 JKg-1K-1)

• 0.15°C

• 1.5°C

• 15.0°C

• 21.0°C

What is the final temperature after 30 minutes if an electric heater rated 12V is used to heat 450g of water when a current of 5A was passed through it? (Specific capacity of water = 4200 JKg-1K-1)

• 20K

• 57K

• 80K

• 40K

What is the final steady temperature of the mixture if 60g of water at 90°C is poured into a calorimeter containing 20g of water at 30°C?

• 25°C

• 90°C

• 75°C

• 68°C

How much heat is required to change 10kg of an object from 20°C to 70°C? (Specific heat capacity of the object is 200JKg-1K-1)

• 1x10^5J

• 1x10^4J

• 40J

• 105J

Which of the following is not used to determine the heat content of a body?

• Volume of the body

• Mass of the body

• Temperature of the body

• Specific heat capacity of the body