# Grade 9 Physics (Heat fusion, Heat Capacity)

• The_Rice_Immortal

#### The_Rice_Immortal

Homework Statement
The melting point of a solid is 90 C. What is the heat required to change 2.5 kg of this solid at 30 C to a liquid

The specific heat of the solid is (390 j/KG.C) and its heat fusion is (4000 J/KG)
Relevant Equations
Q=mC ΔT heat capacity
Q=mHf heat of fusion
Q1=2.5(390)(90-30) =58500

Q2=2.5(4000) = 10000

Qtotal = 58500+10000

Q=68500

=6.8x10^4

my teacher sent this as a homework but the options were
4.9x10^4 J
1x10^4 J
6.8x10^5 J
5.9x10^4 J

im confused is is this a typo or did i do something wrong
The text contains a physics problem related to calculating the heat required to change a solid to a liquid, including the specific heat and heat of fusion. The problem is followed by a step-by-step solution and a question about whether the calculated answer matches the provided options.
single_question_with_answer
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
# Grade 9 Physics (Heat fusion, Heat Capacity)

• The_Rice_Immortal

#### The_Rice_Immortal

Homework Statement
The melting point of a solid is 90 C. What is the heat required to change 2.5 kg of this solid at 30 C to a liquid

The specific heat of the solid is (390 j/KG.C) and its heat fusion is (4000 J/KG)
Relevant Equations
Q=mC ΔT heat capacity
Q=mHf heat of fusion
Q1=2.5(390)(90-30) =58500

Q2=2.5(4000) = 10000

Qtotal = 58500+10000

Q=68500

=6.8x10^4

my teacher sent this as a homework but the options were
4.9x10^4 J
1x10^4 J
6.8x10^5 J
5.9x10^4 J

im confused is is this a typo or did i do something wrong
user
The text contains a physics problem related to calculating the heat required to change a solid to a liquid, including the specific heat and heat of fusion. The problem is followed by a step-by-step solution and a question about whether the calculated answer matches the provided options.

TYPE: SINGLE_QUESTION_WITH_ANSWER