Question 1:

The formula

is used to calculate the heat transferred when a substance changes temperature (i.e., its temperature increases or decreases), without changing state.

So it applies when a substance is heated but staying in the same state (solid, liquid, or gas).

Correct answer: C. heated but staying in the same state.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 2:

We use the formula:

Given:
m=2 kg
c=4200 J/kg°C
ΔT=5 °C

Q=2×4200×5

Q=42000 J

Correct answer: C. 42000 J.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 3:

We use the same formula:

Given:
Q=210 kJ = 210,000 J
m=2 kg
c=4200 J/kg°C

210,000=2×4200×ΔT

ΔT=210,000/8400=25 °C

Correct answer: A. 25 °C.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 4:

We have three rows with missing values. Use Q = m * c * ΔT, c=800 J/(kg°C).

Energy supplied = ? , m=20 kg, ΔT=10°C. So Q = 20 * 800 * 10 = 20*8000 = 160,000 J = 160 kJ.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 5:

We have three rows with missing values. Use Q = m * c * ΔT, c=800 J/(kg°C).

Q=8000 J, m=?, ΔT=20°C. So m = Q/(cΔT)=8000/(800*20)=8000/16000=0.5 kg.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 6:

We have three rows with missing values. Use Q = m * c * ΔT, c=800 J/(kg°C).

Q=400 kJ = 400,000 J, m=5 kg, ΔT=?. So ΔT = Q/(m*c)=400000/(5*800)=400000/4000=100°C.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 7:

We need to identify which option correctly matches the terms "Latent Heat of Fusion" and "Latent Heat of Vaporisation" with the correct change of state.

• Latent heat of fusion: energy for change between solid and liquid (melting or freezing). Usually associated with solid to liquid (melting) or liquid to solid (freezing), but the term "fusion" specifically refers to melting (solid to liquid).

• Latent heat of vaporisation: energy for change between liquid and gas (boiling/condensation). Typically liquid to gas (vaporisation) or gas to liquid (condensation).

Now check the options:

A: Solid to Liquid (fusion), Solid to Gas (vaporisation) – incorrect, vaporisation is liquid to gas, not solid to gas (that's sublimation).

B: Liquid to Gas (fusion? No, that's vaporisation), Solid to Gas (vaporisation? No) – incorrect.

C: Liquid to Gas (fusion? No), Solid to Liquid (vaporisation? No) – incorrect.

D: Solid to Liquid (fusion), Liquid to Gas (vaporisation) – correct.

Thus answer is D.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 8:

We use the formula for latent heat:

where m=100 g=0.1 kg and L=330 kJ/kg.

Correct answer: C. 33 kJ.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 9:

We use Q=mL, so m=Q/L.

Given:
Q=1 MJ=1,000,000 J
L=330 kJ/kg=330,000 J/kg

Roughly 3 kg → option B.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 10:

The graph of temperature vs. time for ice taken from a freezer (below 0 °C), then warmed until it melts and continues to warm as water, has three distinct sections:

1. Initial rise (solid ice heating) – diagonal line sloping upward until it reaches 0 °C.

2. Flat plateau (melting) – horizontal line at 0 °C while the ice absorbs latent heat without temperature change.

3. Final rise (liquid water heating) – diagonal line sloping upward again, starting at 0 °C and increasing.

So the shape is best described as:
A line that rises, then flattens, then rises again. 

This matches graph C.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.