Heat Capacity

When heat is supplied to a metallic sphere, which of the following changes occur?

• The mass of the sphere increases

• The volume of the sphere decreases

• The internal energy of the sphere increases

• The density of the sphere increases

Tags

NGSS.HS-PS3-4

In S.I. unit the specific heat capacity of a substance is the amount of heat is required to

• raise its temperature by 1K

• raise the temperature by 1kg of the substance by 1K

• raise its temperature by 1^oC

• Boil 1kg of the substance

Tags

NGSS.HS-PS3-4

When a 0.24 kg brass cylinder is heated using a 2.0 kW heater, its temperature increases from 30^oC to 100^oC in 3.2s . What is the specific heat capacity of brass?

• 125 J kg^-1 K^-1

• 169 J kg^-1 K^-1

• 381 J kg^-1 K^-1

• 400 J kg^-1 K^-1

Tags

NGSS.HS-PS3-4

A cup of coffee at 80^oC is left to cool to 30^oC. If the heat capacity of the cup and coffee is 2.0 J kg K^-1 , how much heat is released during the cooling?

• 0.04 kJ

• 60 kJ

• 100 kJ

• 160 kJ

Tags

NGSS.HS-PS3-4

A 4 kg mass of copper of specific heat capacity 400 J kg^-1 K^-1 is heated for 160 s by a heater of power 100 W. What is the rise in temperature?

• 1.6 K

• 10 K

• 16 K

• 100 K

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

The temperature of water from Tap A and Tap B is 25^oC and 75^oC respectively. If the mixture of water at 40^oC is required, what is the ratio of the mass of water from Tap A to that of Tap B?

• 1:3

• 2:3

• 3:1

• 3:7

• 7:3

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The heat capacity of water is

• 4.186 joule/gram °C

• 4.681 joule/gram °C

• 4.816 joule/gram °C

• 4.618 joule/gram °C

Heat capacity is the amount what energy needed to raise the temperature of a body by 1 K or 1^oC

Tags

NGSS.HS-PS3-4

In a laboratory, bunsen burner is used to increase the temperature of lime from 10 °C to 50 °C with the thermal energy of 80000 J. If the mass of the lime is 20 kg the specific heat capacity of the lime would be

• . 25 J kg ^-1 °C^-1

• 50 J kg ^-1 °C^-1

• 75 J kg ^-1 °C^-1

• 100 J kg ^-1 °C^-1

Tags

NGSS.HS-PS3-1

If the heat capacity of a solid is 1500 JK^-1 and mass is 75 kg. The specific heat capacity of the solid would be

• 10 J kg ^-1 °C^-1

• 20 J kg ^-1 °C^-1

• 30 J kg ^-1 °C^-1

• 40 J kg ^-1 °C^-1