# Problem: How much energy is required to heat 36.0 g H 2O from a liquid at 65°C to a gas at 115°C?  The following physical data may be useful.ΔHvap = 40.7 kJ/molCliq = 4.18 J/g°CCgas = 2.01 J/g°CCsol = 2.09 J/g°CTmelting = 0°CTboiling = 100°CA) 52.7 kJ      B) 91.7 kJ      C) 87.7 kJ      D) 63.5 kJ      E) 10.9 kJ

96% (37 ratings)
###### FREE Expert Solution

We’re being asked to calculate the amount of energy required to convert 36.0 g of liquid water at 65 ˚C to a gas at 115 ˚C. There are three heats involved in this problem:

1. q1 which is the heat in raising the temperature of 36.0 g of water from 65 ˚C to 100 ˚C

2. q2 which is the heat in evaporating 36.0 g of water at 100˚C

3. q3 which is the heat in raising the temperature of 36.0 g of water vapor from 100˚C to 115˚C

We need to solve for each heat individually then add them together to get the final answer.

96% (37 ratings) ###### Problem Details

How much energy is required to heat 36.0 g H 2O from a liquid at 65°C to a gas at 115°C?  The following physical data may be useful.

ΔHvap = 40.7 kJ/mol

Cliq = 4.18 J/g°C

Cgas = 2.01 J/g°C

Csol = 2.09 J/g°C

Tmelting = 0°C

Tboiling = 100°C

A) 52.7 kJ      B) 91.7 kJ      C) 87.7 kJ      D) 63.5 kJ      E) 10.9 kJ

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Heating and Cooling Curves concept. You can view video lessons to learn Heating and Cooling Curves. Or if you need more Heating and Cooling Curves practice, you can also practice Heating and Cooling Curves practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofHow much energy is required to heat 36.0 g H 2O from a liqui...as medium difficulty.

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Based on our data, we think this problem is relevant for Professor Thomas' class at TEMPLE.