Question

A 0.0500 kg ice cube starts at -18.5°C. How much heat does it take to melt it completely? (Don't forget, you have to warm it up to the melting point first.) (Unit=J)

Answer 1

20522.05 J

Step-by-step explanation:

Total energy to melt ice

= Energy needed to bring ice to 0 C + Energy needed to change state from solid to liquid

= mcT + mlf [bolded is to bring ice to 0 C, italicised is state change]

= (0.0500)(4186)(18.5) + (0.0500)(3.33 × 10^5)

= 20522.05 J