Heat Calculations

Front

What is the formula to calculate the heat energy required to change the temperature of a substance?

Back

q = mcΔT, where q is heat energy, m is mass, c is specific heat capacity, and ΔT is the change in temperature.

Front

What does 'q' represent in heat calculations?

Back

'q' represents the amount of heat energy absorbed or released.

Front

What is the specific heat capacity of water?

Back

The specific heat capacity of water is approximately 4.18 J/g°C.

Front

How do you calculate the heat required to melt ice?

Back

Use the formula q = mH_f, where H_f is the heat of fusion.

Front

What is the heat of fusion for ice?

Back

The heat of fusion for ice is approximately 334 J/g.

Front

How much energy is required to completely boil away 150g of water at its boiling point?

Back

339000 J.

Front

How do you calculate the heat released when water cools?

Back

Use the formula q = mcΔT, where ΔT is the change in temperature.

Front

What is the heat released when 200g of water cools from 80°C to 20°C?

Back

50160 J.

Front

What is the formula to calculate the heat energy required to change the state of a substance?

Back

q = mH, where H is the heat of the phase change (fusion or vaporization).

Front

How many Joules of energy are required to completely melt 100 grams of ice at 0°C?

Back

33,400 J.