Practice thermal Energy calculations

Practice thermal calculations

Explain the relationship between temperature, enery, and motion of particles in an object.

• _____________ is the average ______________ ___________ of particles in an object.

• So, the higher the _____________ the greater the ________ of the particles, therefore the ________ the particles are ___________

Referencing he reasoning you used from #1, explain the difference between objects that feel hot and those that feel cold.

• Objects that feel hot have more _________, because they have a greater ___________ and thus a greater _________ ________ in their particles. Objects that feel Cold have ________ heat, because they have a lower ____________ and thus a lower _________ ________ in their particles.

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You've been waiting for the bus and your hands become cold. When you get onto the bus and sit down, you put your hands under your legs to warm up. After a while your hands feel warmer but your legs feel colder. Explain this with regards to what you know about thermal energy transfer.

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Why were you able to warm your hands under your leg?

• Your body is __________ than your hands, thus your body has a higher _____________ and more _________.

Which direction did the energy flow?

• Heat flows from _________ ________ objects to _________ __________ objects, so heat will leave your _________ and move to your ________. This causes the feeling of absence of heat in your _________.

How much energy must be absorbed by water with a mass of 0.5 kg in order to raise the temperature from 30° to 65° Celsius? Note water has a specific heat of 4,190 j/kg° C

how much heat is needed to warm .052kg of gold from 30°C to 120°C? Note Gold has a specific heat of 136 j/kg°C

A 9.5 kg outdoor copper sculpture heats up during the day from 24°C to 78° C. How much energy was absorbed? Note: copper has a specific heat of 390 j/kg°C

If it takes 820 J of heat to warm a sample of Zinc from 0°C to 50°C, what would be the mas of the zinc? Note: Zinc has a specific heat of 380 j/kg°C