Thermodynamics Review

Front

Define Exothermic

Back

Energy is released; ΔH is negative; Going from Gas to Liquid, Liquid to Solid.

Front

What happens during condensation of water droplets on a cold window? Is it exothermic or endothermic?

Back

Gases condense to form liquids. Gases are moving faster than liquids, releasing energy, which is Exothermic.

Front

What is the mass and change in temperature when heating 200 grams of water from 24.0° C to 100.0° C?

Back

m=200g; ∆t=76.

Front

Is the phase change from GAS to LIQUID exothermic or endothermic?

Back

Exothermic.

Front

Calculate the change in temperature of a 300.0 g piece of copper heated with 66,300 J of energy. Specific heat of copper is 0.3845 J/g °C.

Back

641 °C.

Front

What is Thermodynamics?

Back

The study of energy, heat, and work, and how they interact.

Front

Define Endothermic.

Back

Energy is absorbed; ΔH is positive; Going from Solid to Liquid, Liquid to Gas.

Front

What is the specific heat capacity?

Back

The amount of heat required to raise the temperature of 1 gram of a substance by 1 °C.

Front

What is the formula for calculating heat energy (q)?

Back

q = m × c × ΔT, where m is mass, c is specific heat, and ΔT is change in temperature.

Front

What is the difference between heat and temperature?

Back

Heat is the total energy of molecular motion in a substance, while temperature is a measure of the average energy of that motion.