Question

How much thermal energy (in kcal) is required to change a 46 g ice cube from...

How much thermal energy (in kcal) is required to change a 46 g ice cube from a solid at - 6.6 oC to steam at 21.1 oC above boiling?

Homework Answers

Answer #1

Given values are, mass of ice = 46 g, temperature of ice = -6.6 = -266.4 K, temperature of steam = 121.1 = 394.1 k

Values to be used:

specific heat of ice = 2.06 J/g-K, specific heat of water = 4.18J/g-K, specific heat of steam = 1.87J/g-K, latent heat of fusion = 334J/g, latent heat of vaporization = 2258J/g

To calculate the thermal energy required to change ice in to steam, we have to consider following step

1) Energy required to convert -6.6 ice to 0 ice = ms = 46*2.06*6.6 = 94.76J

2) Energy required to convert 0 ice to 0 water = mL = 46*334=15364J

3) Energy required to convert 0 water to 100 water = ms = 4.18*46*100 = 19228J

4) Energy required to convert 100 water to 100 steam = mL = 46*2258 = 103868J

5)Energy required to convert 100 steam to 121.1 steam = ms = 46*1.87*21.1 = 1815J

Hence total thermal energy required will be equal to the sum of all energy calculated above and is = 140369.76J

In kCal units = 160369.76/4.18*10^3 = 33.54kCal

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
How much energy is required to change a 40 g ice cube from ice at -10...
How much energy is required to change a 40 g ice cube from ice at -10 oC to steam at 110 oC? cwater=4186 J kg-1 oC-1 cice=2090 J kg-1 oC-1 cvapor=2010 J kg-1 oC-1 Lf=3.3x105 J kg-1 Lv=2.26x106 J kg-1
How much energy is required to change a 30-g ice cube from ice at -40C to...
How much energy is required to change a 30-g ice cube from ice at -40C to steam at 105C?
How much energy in Joules is required to change a 30-g ice cube from ice at...
How much energy in Joules is required to change a 30-g ice cube from ice at ?40°C to steam at 110°C?
How much energy is required to change a 50-g ice cube from ice at −25°C to...
How much energy is required to change a 50-g ice cube from ice at −25°C to steam at 130
How much energy is required to change a 35-g ice cube from ice at ?35°C to...
How much energy is required to change a 35-g ice cube from ice at ?35°C to steam at 140°C?
How much energy is required to change a 45.0-g ice cube from ice at -6.0°C to...
How much energy is required to change a 45.0-g ice cube from ice at -6.0°C to steam at 115°C?
How much energy is required to change a 40-g ice cube from ice at -10 Celsius...
How much energy is required to change a 40-g ice cube from ice at -10 Celsius to steam at 110 Celsius?
How much energy is required to change a 55-g ice cube from ice at −25°C to...
How much energy is required to change a 55-g ice cube from ice at −25°C to steam at 130°C?
How much energy is required to change a 35 g ice cube from ice at ?7...
How much energy is required to change a 35 g ice cube from ice at ?7 ?C to steam at 108?C? The specific heat of ice is 2090 J/kg
How much energy is required to change a 55-g ice cube from ice at 0°C to...
How much energy is required to change a 55-g ice cube from ice at 0°C to steam at 140°C? J