How much ice in grams would have to melt to lower the temperature of 360 mL of water from 45 ∘C to 0 ∘C? (Assume that the density of water is 1.0 g/mL.) Express your answer using two significant figures.

Answer

203.7g

Explanation:

Heat gained= - heat lost

From the question

Mass of water = 360g

Heat capacity of water= 4.2Jg-1

Latent heat of ice= 334Jg-1

ml= -mcθ

m×334= -(360×4.2×(0-45))

334m= 68040

m= 68040/334

=203.7g

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance