1/13 Quiz

If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C? 

• -80,371.2
• 44,938.6
• 80,371.2
• 112,575.9

For a skillet, used for cooking, do you want a high or low specific heat

• High, so that it will need more energy to heat up
• Low, so that it will change temperature quickly

How many Joules of energy are required to change 10 gram of water from 20 ^οC to 90 ^οC?

• 1400 J
• 2800 J
• 210,000 J
• 1,400,000 J

A high specific heat means...

• It heats up quickly with energy added
• It requires more energy to change temperature

What is the change in temperature when 50,000 Joules of energy is added to 200 grams of water at 25 C?

• 0.016 C
• 1,500 C
• 63 C
• 0.4 C

How many Joules of energy are required to make 50.0 grams of ice at 0 ^οC completely melt?

• 334 J

• 0 J

• 33,400 J

• 16,700 J

What is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t

• Q=mH

• Q= ½mv

• m=QC

Calculate the energy needed to completely boil away 30 g of water at 100 ⁰C .

• 67,800 J

• 2260 J

• 226,000 J

• 100 J

What is the mass of ice that can melt at 0 C if 3,325 joules of energy is added.

• 10 g

• 334 g

• 3325 g

• 8.0 g

What mass of water vapor can condense at 100 C if 233,000 J of energy is released?

• 103g

• 698g

• 557g

• 276g