Question

A) How much heat is required to change a 44.4 g ice cube from ice at -13.2 degrees Celsius to water at 80 degrees Celsius? (If necessary, use c of ice= 2090 J/kg degrees Celsius and c of steam= 2010 J/ kg degrees Celsius) B) How much heat is required to change a 44.4 g ice cube from ice at -13.2 degrees Celsius to steam at 117 degrees Celsius?

Answer 1

A) Q_net = Q_{temperature increae} + Q_{state change} + Q_{temperature increae}

Q_net = mc_iceΔT + mLf + mc_waterΔT

Plugging values,

Q_net = 0.0444*2090*(0-(-13.2)) + 0.0444*334*10^3+0.0444*4186*(80-0)

Q_net = 30923 J

B) ) Q_net = Q_{temperature increae} + Q_{state change} + Q_{temperature increae} + Q_{state change} + Q_{temperature increae}

Q_net = mc_iceΔT + mLf + mc_waterΔT + mLv + mc_waterΔT

Plugging values,

Q_net = 0.0444*2090*(0-(-13.2)) + 0.0444*334*10^3+0.0444*4186*(100-0) + 0.0444*2257*10^3+0.0444*2010*(117-100)

Q_net = 136368.3 J