- #1
MIA6
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If 1 kilogram of solid X at -20C gains 40 kilojoules of energy, its temperature will be ____
1) -120 2) -80 3) -20 4) 80
Given: Specific heat of solid: 0.4, heat of fusion: 60, melting point:-20,
So I did: mL+40=0.4(T+20) --> 60+40=0.4(T+20), T=230. But no choice for that.
Then I have one question, is there any way to tell if a substance is solid or liquid or gas, in other words, what phase? because there is a diagram with temperature on y-axis, time on x-axis, so how can I tell what phase a certain point is.
Thank you.
1) -120 2) -80 3) -20 4) 80
Given: Specific heat of solid: 0.4, heat of fusion: 60, melting point:-20,
So I did: mL+40=0.4(T+20) --> 60+40=0.4(T+20), T=230. But no choice for that.
Then I have one question, is there any way to tell if a substance is solid or liquid or gas, in other words, what phase? because there is a diagram with temperature on y-axis, time on x-axis, so how can I tell what phase a certain point is.
Thank you.